gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  24         eval 'sub CGI::multi_param { CGI::param(@_) }'
  25 }
  26
  27 our $t0 = [ gettimeofday() ];
  28 our $number_of_git_cmds = 0;
  29
  30 BEGIN {
  31         CGI->compile() if $ENV{'MOD_PERL'};
  32 }
  33
  34 our $version = "++GIT_VERSION++";
  35
  36 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  37 sub evaluate_uri {
  38         our $cgi;
  39
  40         our $my_url = $cgi->url();
  41         our $my_uri = $cgi->url(-absolute => 1);
  42
  43         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  44         # needed and used only for URLs with nonempty PATH_INFO
  45         our $base_url = $my_url;
  46
  47         # When the script is used as DirectoryIndex, the URL does not contain the name
  48         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  49         # have to do it ourselves. We make $path_info global because it's also used
  50         # later on.
  51         #
  52         # Another issue with the script being the DirectoryIndex is that the resulting
  53         # $my_url data is not the full script URL: this is good, because we want
  54         # generated links to keep implying the script name if it wasn't explicitly
  55         # indicated in the URL we're handling, but it means that $my_url cannot be used
  56         # as base URL.
  57         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  58         # to build the base URL ourselves:
  59         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  60         if ($path_info) {
  61                 # $path_info has already been URL-decoded by the web server, but
  62                 # $my_url and $my_uri have not. URL-decode them so we can properly
  63                 # strip $path_info.
  64                 $my_url = unescape($my_url);
  65                 $my_uri = unescape($my_uri);
  66                 if ($my_url =~ s,\Q$path_info\E$,, &&
  67                     $my_uri =~ s,\Q$path_info\E$,, &&
  68                     defined $ENV{'SCRIPT_NAME'}) {
  69                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  70                 }
  71         }
  72
  73         # target of the home link on top of all pages
  74         our $home_link = $my_uri || "/";
  75 }
  76
  77 # core git executable to use
  78 # this can just be "git" if your webserver has a sensible PATH
  79 our $GIT = "++GIT_BINDIR++/git";
  80
  81 # absolute fs-path which will be prepended to the project path
  82 #our $projectroot = "/pub/scm";
  83 our $projectroot = "++GITWEB_PROJECTROOT++";
  84
  85 # fs traversing limit for getting project list
  86 # the number is relative to the projectroot
  87 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  88
  89 # string of the home link on top of all pages
  90 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  91
  92 # extra breadcrumbs preceding the home link
  93 our @extra_breadcrumbs = ();
  94
  95 # name of your site or organization to appear in page titles
  96 # replace this with something more descriptive for clearer bookmarks
  97 our $site_name = "++GITWEB_SITENAME++"
  98                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  99
 100 # html snippet to include in the <head> section of each page
 101 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 102 # filename of html text to include at top of each page
 103 our $site_header = "++GITWEB_SITE_HEADER++";
 104 # html text to include at home page
 105 our $home_text = "++GITWEB_HOMETEXT++";
 106 # filename of html text to include at bottom of each page
 107 our $site_footer = "++GITWEB_SITE_FOOTER++";
 108
 109 # URI of stylesheets
 110 our @stylesheets = ("++GITWEB_CSS++");
 111 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 112 our $stylesheet = undef;
 113 # URI of GIT logo (72x27 size)
 114 our $logo = "++GITWEB_LOGO++";
 115 # URI of GIT favicon, assumed to be image/png type
 116 our $favicon = "++GITWEB_FAVICON++";
 117 # URI of gitweb.js (JavaScript code for gitweb)
 118 our $javascript = "++GITWEB_JS++";
 119
 120 # URI and label (title) of GIT logo link
 121 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 122 #our $logo_label = "git documentation";
 123 our $logo_url = "http://git-scm.com/";
 124 our $logo_label = "git homepage";
 125
 126 # source of projects list
 127 our $projects_list = "++GITWEB_LIST++";
 128
 129 # the width (in characters) of the projects list "Description" column
 130 our $projects_list_description_width = 25;
 131
 132 # group projects by category on the projects list
 133 # (enabled if this variable evaluates to true)
 134 our $projects_list_group_categories = 0;
 135
 136 # default category if none specified
 137 # (leave the empty string for no category)
 138 our $project_list_default_category = "";
 139
 140 # default order of projects list
 141 # valid values are none, project, descr, owner, and age
 142 our $default_projects_order = "project";
 143
 144 # show repository only if this file exists
 145 # (only effective if this variable evaluates to true)
 146 our $export_ok = "++GITWEB_EXPORT_OK++";
 147
 148 # don't generate age column on the projects list page
 149 our $omit_age_column = 0;
 150
 151 # don't generate information about owners of repositories
 152 our $omit_owner=0;
 153
 154 # show repository only if this subroutine returns true
 155 # when given the path to the project, for example:
 156 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 157 our $export_auth_hook = undef;
 158
 159 # only allow viewing of repositories also shown on the overview page
 160 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 161
 162 # list of git base URLs used for URL to where fetch project from,
 163 # i.e. full URL is "$git_base_url/$project"
 164 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 165
 166 # default blob_plain mimetype and default charset for text/plain blob
 167 our $default_blob_plain_mimetype = 'text/plain';
 168 our $default_text_plain_charset  = undef;
 169
 170 # file to use for guessing MIME types before trying /etc/mime.types
 171 # (relative to the current git repository)
 172 our $mimetypes_file = undef;
 173
 174 # assume this charset if line contains non-UTF-8 characters;
 175 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 176 # for which encoding all byte sequences are valid, for example
 177 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 178 # could be even 'utf-8' for the old behavior)
 179 our $fallback_encoding = 'latin1';
 180
 181 # rename detection options for git-diff and git-diff-tree
 182 # - default is '-M', with the cost proportional to
 183 #   (number of removed files) * (number of new files).
 184 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 185 #   (number of changed files + number of removed files) * (number of new files)
 186 # - even more costly is '-C', '--find-copies-harder' with cost
 187 #   (number of files in the original tree) * (number of new files)
 188 # - one might want to include '-B' option, e.g. '-B', '-M'
 189 our @diff_opts = ('-M'); # taken from git_commit
 190
 191 # Disables features that would allow repository owners to inject script into
 192 # the gitweb domain.
 193 our $prevent_xss = 0;
 194
 195 # Path to the highlight executable to use (must be the one from
 196 # http://www.andre-simon.de due to assumptions about parameters and output).
 197 # Useful if highlight is not installed on your webserver's PATH.
 198 # [Default: highlight]
 199 our $highlight_bin = "++HIGHLIGHT_BIN++";
 200
 201 # information about snapshot formats that gitweb is capable of serving
 202 our %known_snapshot_formats = (
 203         # name => {
 204         #       'display' => display name,
 205         #       'type' => mime type,
 206         #       'suffix' => filename suffix,
 207         #       'format' => --format for git-archive,
 208         #       'compressor' => [compressor command and arguments]
 209         #                       (array reference, optional)
 210         #       'disabled' => boolean (optional)}
 211         #
 212         'tgz' => {
 213                 'display' => 'tar.gz',
 214                 'type' => 'application/x-gzip',
 215                 'suffix' => '.tar.gz',
 216                 'format' => 'tar',
 217                 'compressor' => ['gzip', '-n']},
 218
 219         'tbz2' => {
 220                 'display' => 'tar.bz2',
 221                 'type' => 'application/x-bzip2',
 222                 'suffix' => '.tar.bz2',
 223                 'format' => 'tar',
 224                 'compressor' => ['bzip2']},
 225
 226         'txz' => {
 227                 'display' => 'tar.xz',
 228                 'type' => 'application/x-xz',
 229                 'suffix' => '.tar.xz',
 230                 'format' => 'tar',
 231                 'compressor' => ['xz'],
 232                 'disabled' => 1},
 233
 234         'zip' => {
 235                 'display' => 'zip',
 236                 'type' => 'application/x-zip',
 237                 'suffix' => '.zip',
 238                 'format' => 'zip'},
 239 );
 240
 241 # Aliases so we understand old gitweb.snapshot values in repository
 242 # configuration.
 243 our %known_snapshot_format_aliases = (
 244         'gzip'  => 'tgz',
 245         'bzip2' => 'tbz2',
 246         'xz'    => 'txz',
 247
 248         # backward compatibility: legacy gitweb config support
 249         'x-gzip' => undef, 'gz' => undef,
 250         'x-bzip2' => undef, 'bz2' => undef,
 251         'x-zip' => undef, '' => undef,
 252 );
 253
 254 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 255 # are changed, it may be appropriate to change these values too via
 256 # $GITWEB_CONFIG.
 257 our %avatar_size = (
 258         'default' => 16,
 259         'double'  => 32
 260 );
 261
 262 # Used to set the maximum load that we will still respond to gitweb queries.
 263 # If server load exceed this value then return "503 server busy" error.
 264 # If gitweb cannot determined server load, it is taken to be 0.
 265 # Leave it undefined (or set to 'undef') to turn off load checking.
 266 our $maxload = 300;
 267
 268 # configuration for 'highlight' (http://www.andre-simon.de/)
 269 # match by basename
 270 our %highlight_basename = (
 271         #'Program' => 'py',
 272         #'Library' => 'py',
 273         'SConstruct' => 'py', # SCons equivalent of Makefile
 274         'Makefile' => 'make',
 275 );
 276 # match by extension
 277 our %highlight_ext = (
 278         # main extensions, defining name of syntax;
 279         # see files in /usr/share/highlight/langDefs/ directory
 280         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 281         # alternate extensions, see /etc/highlight/filetypes.conf
 282         (map { $_ => 'c'   } qw(c h)),
 283         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 284         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 285         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 286         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 287         (map { $_ => 'make'} qw(make mak mk)),
 288         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 289 );
 290
 291 # You define site-wide feature defaults here; override them with
 292 # $GITWEB_CONFIG as necessary.
 293 our %feature = (
 294         # feature => {
 295         #       'sub' => feature-sub (subroutine),
 296         #       'override' => allow-override (boolean),
 297         #       'default' => [ default options...] (array reference)}
 298         #
 299         # if feature is overridable (it means that allow-override has true value),
 300         # then feature-sub will be called with default options as parameters;
 301         # return value of feature-sub indicates if to enable specified feature
 302         #
 303         # if there is no 'sub' key (no feature-sub), then feature cannot be
 304         # overridden
 305         #
 306         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 307         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 308         # is enabled
 309
 310         # Enable the 'blame' blob view, showing the last commit that modified
 311         # each line in the file. This can be very CPU-intensive.
 312
 313         # To enable system wide have in $GITWEB_CONFIG
 314         # $feature{'blame'}{'default'} = [1];
 315         # To have project specific config enable override in $GITWEB_CONFIG
 316         # $feature{'blame'}{'override'} = 1;
 317         # and in project config gitweb.blame = 0|1;
 318         'blame' => {
 319                 'sub' => sub { feature_bool('blame', @_) },
 320                 'override' => 0,
 321                 'default' => [0]},
 322
 323         # Enable the 'incremental blame' blob view, which uses javascript to
 324         # incrementally show the revisions of lines as they are discovered
 325         # in the history. It is better for large histories, files and slow
 326         # servers, but requires javascript in the client and can slow down the
 327         # browser on large files.
 328
 329         # To enable system wide have in $GITWEB_CONFIG
 330         # $feature{'blame_incremental'}{'default'} = [1];
 331         # To have project specific config enable override in $GITWEB_CONFIG
 332         # $feature{'blame_incremental'}{'override'} = 1;
 333         # and in project config gitweb.blame_incremental = 0|1;
 334         'blame_incremental' => {
 335                 'sub' => sub { feature_bool('blame_incremental', @_) },
 336                 'override' => 0,
 337                 'default' => [0]},
 338
 339         # Enable the 'snapshot' link, providing a compressed archive of any
 340         # tree. This can potentially generate high traffic if you have large
 341         # project.
 342
 343         # Value is a list of formats defined in %known_snapshot_formats that
 344         # you wish to offer.
 345         # To disable system wide have in $GITWEB_CONFIG
 346         # $feature{'snapshot'}{'default'} = [];
 347         # To have project specific config enable override in $GITWEB_CONFIG
 348         # $feature{'snapshot'}{'override'} = 1;
 349         # and in project config, a comma-separated list of formats or "none"
 350         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 351         'snapshot' => {
 352                 'sub' => \&feature_snapshot,
 353                 'override' => 0,
 354                 'default' => ['tgz']},
 355
 356         # Enable text search, which will list the commits which match author,
 357         # committer or commit text to a given string.  Enabled by default.
 358         # Project specific override is not supported.
 359         #
 360         # Note that this controls all search features, which means that if
 361         # it is disabled, then 'grep' and 'pickaxe' search would also be
 362         # disabled.
 363         'search' => {
 364                 'override' => 0,
 365                 'default' => [1]},
 366
 367         # Enable grep search, which will list the files in currently selected
 368         # tree containing the given string. Enabled by default. This can be
 369         # potentially CPU-intensive, of course.
 370         # Note that you need to have 'search' feature enabled too.
 371
 372         # To enable system wide have in $GITWEB_CONFIG
 373         # $feature{'grep'}{'default'} = [1];
 374         # To have project specific config enable override in $GITWEB_CONFIG
 375         # $feature{'grep'}{'override'} = 1;
 376         # and in project config gitweb.grep = 0|1;
 377         'grep' => {
 378                 'sub' => sub { feature_bool('grep', @_) },
 379                 'override' => 0,
 380                 'default' => [1]},
 381
 382         # Enable the pickaxe search, which will list the commits that modified
 383         # a given string in a file. This can be practical and quite faster
 384         # alternative to 'blame', but still potentially CPU-intensive.
 385         # Note that you need to have 'search' feature enabled too.
 386
 387         # To enable system wide have in $GITWEB_CONFIG
 388         # $feature{'pickaxe'}{'default'} = [1];
 389         # To have project specific config enable override in $GITWEB_CONFIG
 390         # $feature{'pickaxe'}{'override'} = 1;
 391         # and in project config gitweb.pickaxe = 0|1;
 392         'pickaxe' => {
 393                 'sub' => sub { feature_bool('pickaxe', @_) },
 394                 'override' => 0,
 395                 'default' => [1]},
 396
 397         # Enable showing size of blobs in a 'tree' view, in a separate
 398         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 399
 400         # To disable system wide have in $GITWEB_CONFIG
 401         # $feature{'show-sizes'}{'default'} = [0];
 402         # To have project specific config enable override in $GITWEB_CONFIG
 403         # $feature{'show-sizes'}{'override'} = 1;
 404         # and in project config gitweb.showsizes = 0|1;
 405         'show-sizes' => {
 406                 'sub' => sub { feature_bool('showsizes', @_) },
 407                 'override' => 0,
 408                 'default' => [1]},
 409
 410         # Make gitweb use an alternative format of the URLs which can be
 411         # more readable and natural-looking: project name is embedded
 412         # directly in the path and the query string contains other
 413         # auxiliary information. All gitweb installations recognize
 414         # URL in either format; this configures in which formats gitweb
 415         # generates links.
 416
 417         # To enable system wide have in $GITWEB_CONFIG
 418         # $feature{'pathinfo'}{'default'} = [1];
 419         # Project specific override is not supported.
 420
 421         # Note that you will need to change the default location of CSS,
 422         # favicon, logo and possibly other files to an absolute URL. Also,
 423         # if gitweb.cgi serves as your indexfile, you will need to force
 424         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 425         'pathinfo' => {
 426                 'override' => 0,
 427                 'default' => [0]},
 428
 429         # Make gitweb consider projects in project root subdirectories
 430         # to be forks of existing projects. Given project $projname.git,
 431         # projects matching $projname/*.git will not be shown in the main
 432         # projects list, instead a '+' mark will be added to $projname
 433         # there and a 'forks' view will be enabled for the project, listing
 434         # all the forks. If project list is taken from a file, forks have
 435         # to be listed after the main project.
 436
 437         # To enable system wide have in $GITWEB_CONFIG
 438         # $feature{'forks'}{'default'} = [1];
 439         # Project specific override is not supported.
 440         'forks' => {
 441                 'override' => 0,
 442                 'default' => [0]},
 443
 444         # Insert custom links to the action bar of all project pages.
 445         # This enables you mainly to link to third-party scripts integrating
 446         # into gitweb; e.g. git-browser for graphical history representation
 447         # or custom web-based repository administration interface.
 448
 449         # The 'default' value consists of a list of triplets in the form
 450         # (label, link, position) where position is the label after which
 451         # to insert the link and link is a format string where %n expands
 452         # to the project name, %f to the project path within the filesystem,
 453         # %h to the current hash (h gitweb parameter) and %b to the current
 454         # hash base (hb gitweb parameter); %% expands to %.
 455
 456         # To enable system wide have in $GITWEB_CONFIG e.g.
 457         # $feature{'actions'}{'default'} = [('graphiclog',
 458         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 459         # Project specific override is not supported.
 460         'actions' => {
 461                 'override' => 0,
 462                 'default' => []},
 463
 464         # Allow gitweb scan project content tags of project repository,
 465         # and display the popular Web 2.0-ish "tag cloud" near the projects
 466         # list.  Note that this is something COMPLETELY different from the
 467         # normal Git tags.
 468
 469         # gitweb by itself can show existing tags, but it does not handle
 470         # tagging itself; you need to do it externally, outside gitweb.
 471         # The format is described in git_get_project_ctags() subroutine.
 472         # You may want to install the HTML::TagCloud Perl module to get
 473         # a pretty tag cloud instead of just a list of tags.
 474
 475         # To enable system wide have in $GITWEB_CONFIG
 476         # $feature{'ctags'}{'default'} = [1];
 477         # Project specific override is not supported.
 478
 479         # In the future whether ctags editing is enabled might depend
 480         # on the value, but using 1 should always mean no editing of ctags.
 481         'ctags' => {
 482                 'override' => 0,
 483                 'default' => [0]},
 484
 485         # The maximum number of patches in a patchset generated in patch
 486         # view. Set this to 0 or undef to disable patch view, or to a
 487         # negative number to remove any limit.
 488
 489         # To disable system wide have in $GITWEB_CONFIG
 490         # $feature{'patches'}{'default'} = [0];
 491         # To have project specific config enable override in $GITWEB_CONFIG
 492         # $feature{'patches'}{'override'} = 1;
 493         # and in project config gitweb.patches = 0|n;
 494         # where n is the maximum number of patches allowed in a patchset.
 495         'patches' => {
 496                 'sub' => \&feature_patches,
 497                 'override' => 0,
 498                 'default' => [16]},
 499
 500         # Avatar support. When this feature is enabled, views such as
 501         # shortlog or commit will display an avatar associated with
 502         # the email of the committer(s) and/or author(s).
 503
 504         # Currently available providers are gravatar and picon.
 505         # If an unknown provider is specified, the feature is disabled.
 506
 507         # Gravatar depends on Digest::MD5.
 508         # Picon currently relies on the indiana.edu database.
 509
 510         # To enable system wide have in $GITWEB_CONFIG
 511         # $feature{'avatar'}{'default'} = ['<provider>'];
 512         # where <provider> is either gravatar or picon.
 513         # To have project specific config enable override in $GITWEB_CONFIG
 514         # $feature{'avatar'}{'override'} = 1;
 515         # and in project config gitweb.avatar = <provider>;
 516         'avatar' => {
 517                 'sub' => \&feature_avatar,
 518                 'override' => 0,
 519                 'default' => ['']},
 520
 521         # Enable displaying how much time and how many git commands
 522         # it took to generate and display page.  Disabled by default.
 523         # Project specific override is not supported.
 524         'timed' => {
 525                 'override' => 0,
 526                 'default' => [0]},
 527
 528         # Enable turning some links into links to actions which require
 529         # JavaScript to run (like 'blame_incremental').  Not enabled by
 530         # default.  Project specific override is currently not supported.
 531         'javascript-actions' => {
 532                 'override' => 0,
 533                 'default' => [0]},
 534
 535         # Enable and configure ability to change common timezone for dates
 536         # in gitweb output via JavaScript.  Enabled by default.
 537         # Project specific override is not supported.
 538         'javascript-timezone' => {
 539                 'override' => 0,
 540                 'default' => [
 541                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 542                                      # or undef to turn off this feature
 543                         'gitweb_tz', # name of cookie where to store selected timezone
 544                         'datetime',  # CSS class used to mark up dates for manipulation
 545                 ]},
 546
 547         # Syntax highlighting support. This is based on Daniel Svensson's
 548         # and Sham Chukoury's work in gitweb-xmms2.git.
 549         # It requires the 'highlight' program present in $PATH,
 550         # and therefore is disabled by default.
 551
 552         # To enable system wide have in $GITWEB_CONFIG
 553         # $feature{'highlight'}{'default'} = [1];
 554
 555         'highlight' => {
 556                 'sub' => sub { feature_bool('highlight', @_) },
 557                 'override' => 0,
 558                 'default' => [0]},
 559
 560         # Enable displaying of remote heads in the heads list
 561
 562         # To enable system wide have in $GITWEB_CONFIG
 563         # $feature{'remote_heads'}{'default'} = [1];
 564         # To have project specific config enable override in $GITWEB_CONFIG
 565         # $feature{'remote_heads'}{'override'} = 1;
 566         # and in project config gitweb.remoteheads = 0|1;
 567         'remote_heads' => {
 568                 'sub' => sub { feature_bool('remote_heads', @_) },
 569                 'override' => 0,
 570                 'default' => [0]},
 571
 572         # Enable showing branches under other refs in addition to heads
 573
 574         # To set system wide extra branch refs have in $GITWEB_CONFIG
 575         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 576         # To have project specific config enable override in $GITWEB_CONFIG
 577         # $feature{'extra-branch-refs'}{'override'} = 1;
 578         # and in project config gitweb.extrabranchrefs = dirs of choice
 579         # Every directory is separated with whitespace.
 580
 581         'extra-branch-refs' => {
 582                 'sub' => \&feature_extra_branch_refs,
 583                 'override' => 0,
 584                 'default' => []},
 585 );
 586
 587 sub gitweb_get_feature {
 588         my ($name) = @_;
 589         return unless exists $feature{$name};
 590         my ($sub, $override, @defaults) = (
 591                 $feature{$name}{'sub'},
 592                 $feature{$name}{'override'},
 593                 @{$feature{$name}{'default'}});
 594         # project specific override is possible only if we have project
 595         our $git_dir; # global variable, declared later
 596         if (!$override || !defined $git_dir) {
 597                 return @defaults;
 598         }
 599         if (!defined $sub) {
 600                 warn "feature $name is not overridable";
 601                 return @defaults;
 602         }
 603         return $sub->(@defaults);
 604 }
 605
 606 # A wrapper to check if a given feature is enabled.
 607 # With this, you can say
 608 #
 609 #   my $bool_feat = gitweb_check_feature('bool_feat');
 610 #   gitweb_check_feature('bool_feat') or somecode;
 611 #
 612 # instead of
 613 #
 614 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 615 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 616 #
 617 sub gitweb_check_feature {
 618         return (gitweb_get_feature(@_))[0];
 619 }
 620
 621
 622 sub feature_bool {
 623         my $key = shift;
 624         my ($val) = git_get_project_config($key, '--bool');
 625
 626         if (!defined $val) {
 627                 return ($_[0]);
 628         } elsif ($val eq 'true') {
 629                 return (1);
 630         } elsif ($val eq 'false') {
 631                 return (0);
 632         }
 633 }
 634
 635 sub feature_snapshot {
 636         my (@fmts) = @_;
 637
 638         my ($val) = git_get_project_config('snapshot');
 639
 640         if ($val) {
 641                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 642         }
 643
 644         return @fmts;
 645 }
 646
 647 sub feature_patches {
 648         my @val = (git_get_project_config('patches', '--int'));
 649
 650         if (@val) {
 651                 return @val;
 652         }
 653
 654         return ($_[0]);
 655 }
 656
 657 sub feature_avatar {
 658         my @val = (git_get_project_config('avatar'));
 659
 660         return @val ? @val : @_;
 661 }
 662
 663 sub feature_extra_branch_refs {
 664         my (@branch_refs) = @_;
 665         my $values = git_get_project_config('extrabranchrefs');
 666
 667         if ($values) {
 668                 $values = config_to_multi ($values);
 669                 @branch_refs = ();
 670                 foreach my $value (@{$values}) {
 671                         push @branch_refs, split /\s+/, $value;
 672                 }
 673         }
 674
 675         return @branch_refs;
 676 }
 677
 678 # checking HEAD file with -e is fragile if the repository was
 679 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 680 # and then pruned.
 681 sub check_head_link {
 682         my ($dir) = @_;
 683         my $headfile = "$dir/HEAD";
 684         return ((-e $headfile) ||
 685                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 686 }
 687
 688 sub check_export_ok {
 689         my ($dir) = @_;
 690         return (check_head_link($dir) &&
 691                 (!$export_ok || -e "$dir/$export_ok") &&
 692                 (!$export_auth_hook || $export_auth_hook->($dir)));
 693 }
 694
 695 # process alternate names for backward compatibility
 696 # filter out unsupported (unknown) snapshot formats
 697 sub filter_snapshot_fmts {
 698         my @fmts = @_;
 699
 700         @fmts = map {
 701                 exists $known_snapshot_format_aliases{$_} ?
 702                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 703         @fmts = grep {
 704                 exists $known_snapshot_formats{$_} &&
 705                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 706 }
 707
 708 sub filter_and_validate_refs {
 709         my @refs = @_;
 710         my %unique_refs = ();
 711
 712         foreach my $ref (@refs) {
 713                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 714                 # 'heads' are added implicitly in get_branch_refs().
 715                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 716         }
 717         return sort keys %unique_refs;
 718 }
 719
 720 # If it is set to code reference, it is code that it is to be run once per
 721 # request, allowing updating configurations that change with each request,
 722 # while running other code in config file only once.
 723 #
 724 # Otherwise, if it is false then gitweb would process config file only once;
 725 # if it is true then gitweb config would be run for each request.
 726 our $per_request_config = 1;
 727
 728 # read and parse gitweb config file given by its parameter.
 729 # returns true on success, false on recoverable error, allowing
 730 # to chain this subroutine, using first file that exists.
 731 # dies on errors during parsing config file, as it is unrecoverable.
 732 sub read_config_file {
 733         my $filename = shift;
 734         return unless defined $filename;
 735         # die if there are errors parsing config file
 736         if (-e $filename) {
 737                 do $filename;
 738                 die $@ if $@;
 739                 return 1;
 740         }
 741         return;
 742 }
 743
 744 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 745 sub evaluate_gitweb_config {
 746         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 747         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 748         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 749
 750         # Protect against duplications of file names, to not read config twice.
 751         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 752         # there possibility of duplication of filename there doesn't matter.
 753         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 754         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 755
 756         # Common system-wide settings for convenience.
 757         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 758         read_config_file($GITWEB_CONFIG_COMMON);
 759
 760         # Use first config file that exists.  This means use the per-instance
 761         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 762         read_config_file($GITWEB_CONFIG) and return;
 763         read_config_file($GITWEB_CONFIG_SYSTEM);
 764 }
 765
 766 # Get loadavg of system, to compare against $maxload.
 767 # Currently it requires '/proc/loadavg' present to get loadavg;
 768 # if it is not present it returns 0, which means no load checking.
 769 sub get_loadavg {
 770         if( -e '/proc/loadavg' ){
 771                 open my $fd, '<', '/proc/loadavg'
 772                         or return 0;
 773                 my @load = split(/\s+/, scalar <$fd>);
 774                 close $fd;
 775
 776                 # The first three columns measure CPU and IO utilization of the last one,
 777                 # five, and 10 minute periods.  The fourth column shows the number of
 778                 # currently running processes and the total number of processes in the m/n
 779                 # format.  The last column displays the last process ID used.
 780                 return $load[0] || 0;
 781         }
 782         # additional checks for load average should go here for things that don't export
 783         # /proc/loadavg
 784
 785         return 0;
 786 }
 787
 788 # version of the core git binary
 789 our $git_version;
 790 sub evaluate_git_version {
 791         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 792         $number_of_git_cmds++;
 793 }
 794
 795 sub check_loadavg {
 796         if (defined $maxload && get_loadavg() > $maxload) {
 797                 die_error(503, "The load average on the server is too high");
 798         }
 799 }
 800
 801 # ======================================================================
 802 # input validation and dispatch
 803
 804 # input parameters can be collected from a variety of sources (presently, CGI
 805 # and PATH_INFO), so we define an %input_params hash that collects them all
 806 # together during validation: this allows subsequent uses (e.g. href()) to be
 807 # agnostic of the parameter origin
 808
 809 our %input_params = ();
 810
 811 # input parameters are stored with the long parameter name as key. This will
 812 # also be used in the href subroutine to convert parameters to their CGI
 813 # equivalent, and since the href() usage is the most frequent one, we store
 814 # the name -> CGI key mapping here, instead of the reverse.
 815 #
 816 # XXX: Warning: If you touch this, check the search form for updating,
 817 # too.
 818
 819 our @cgi_param_mapping = (
 820         project => "p",
 821         action => "a",
 822         file_name => "f",
 823         file_parent => "fp",
 824         hash => "h",
 825         hash_parent => "hp",
 826         hash_base => "hb",
 827         hash_parent_base => "hpb",
 828         page => "pg",
 829         order => "o",
 830         searchtext => "s",
 831         searchtype => "st",
 832         snapshot_format => "sf",
 833         extra_options => "opt",
 834         search_use_regexp => "sr",
 835         ctag => "by_tag",
 836         diff_style => "ds",
 837         project_filter => "pf",
 838         # this must be last entry (for manipulation from JavaScript)
 839         javascript => "js"
 840 );
 841 our %cgi_param_mapping = @cgi_param_mapping;
 842
 843 # we will also need to know the possible actions, for validation
 844 our %actions = (
 845         "blame" => \&git_blame,
 846         "blame_incremental" => \&git_blame_incremental,
 847         "blame_data" => \&git_blame_data,
 848         "blobdiff" => \&git_blobdiff,
 849         "blobdiff_plain" => \&git_blobdiff_plain,
 850         "blob" => \&git_blob,
 851         "blob_plain" => \&git_blob_plain,
 852         "commitdiff" => \&git_commitdiff,
 853         "commitdiff_plain" => \&git_commitdiff_plain,
 854         "commit" => \&git_commit,
 855         "forks" => \&git_forks,
 856         "heads" => \&git_heads,
 857         "history" => \&git_history,
 858         "log" => \&git_log,
 859         "patch" => \&git_patch,
 860         "patches" => \&git_patches,
 861         "remotes" => \&git_remotes,
 862         "rss" => \&git_rss,
 863         "atom" => \&git_atom,
 864         "search" => \&git_search,
 865         "search_help" => \&git_search_help,
 866         "shortlog" => \&git_shortlog,
 867         "summary" => \&git_summary,
 868         "tag" => \&git_tag,
 869         "tags" => \&git_tags,
 870         "tree" => \&git_tree,
 871         "snapshot" => \&git_snapshot,
 872         "object" => \&git_object,
 873         # those below don't need $project
 874         "opml" => \&git_opml,
 875         "project_list" => \&git_project_list,
 876         "project_index" => \&git_project_index,
 877 );
 878
 879 # finally, we have the hash of allowed extra_options for the commands that
 880 # allow them
 881 our %allowed_options = (
 882         "--no-merges" => [ qw(rss atom log shortlog history) ],
 883 );
 884
 885 # fill %input_params with the CGI parameters. All values except for 'opt'
 886 # should be single values, but opt can be an array. We should probably
 887 # build an array of parameters that can be multi-valued, but since for the time
 888 # being it's only this one, we just single it out
 889 sub evaluate_query_params {
 890         our $cgi;
 891
 892         while (my ($name, $symbol) = each %cgi_param_mapping) {
 893                 if ($symbol eq 'opt') {
 894                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 895                 } else {
 896                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 897                 }
 898         }
 899 }
 900
 901 # now read PATH_INFO and update the parameter list for missing parameters
 902 sub evaluate_path_info {
 903         return if defined $input_params{'project'};
 904         return if !$path_info;
 905         $path_info =~ s,^/+,,;
 906         return if !$path_info;
 907
 908         # find which part of PATH_INFO is project
 909         my $project = $path_info;
 910         $project =~ s,/+$,,;
 911         while ($project && !check_head_link("$projectroot/$project")) {
 912                 $project =~ s,/*[^/]*$,,;
 913         }
 914         return unless $project;
 915         $input_params{'project'} = $project;
 916
 917         # do not change any parameters if an action is given using the query string
 918         return if $input_params{'action'};
 919         $path_info =~ s,^\Q$project\E/*,,;
 920
 921         # next, check if we have an action
 922         my $action = $path_info;
 923         $action =~ s,/.*$,,;
 924         if (exists $actions{$action}) {
 925                 $path_info =~ s,^$action/*,,;
 926                 $input_params{'action'} = $action;
 927         }
 928
 929         # list of actions that want hash_base instead of hash, but can have no
 930         # pathname (f) parameter
 931         my @wants_base = (
 932                 'tree',
 933                 'history',
 934         );
 935
 936         # we want to catch, among others
 937         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 938         my ($parentrefname, $parentpathname, $refname, $pathname) =
 939                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 940
 941         # first, analyze the 'current' part
 942         if (defined $pathname) {
 943                 # we got "branch:filename" or "branch:dir/"
 944                 # we could use git_get_type(branch:pathname), but:
 945                 # - it needs $git_dir
 946                 # - it does a git() call
 947                 # - the convention of terminating directories with a slash
 948                 #   makes it superfluous
 949                 # - embedding the action in the PATH_INFO would make it even
 950                 #   more superfluous
 951                 $pathname =~ s,^/+,,;
 952                 if (!$pathname || substr($pathname, -1) eq "/") {
 953                         $input_params{'action'} ||= "tree";
 954                         $pathname =~ s,/$,,;
 955                 } else {
 956                         # the default action depends on whether we had parent info
 957                         # or not
 958                         if ($parentrefname) {
 959                                 $input_params{'action'} ||= "blobdiff_plain";
 960                         } else {
 961                                 $input_params{'action'} ||= "blob_plain";
 962                         }
 963                 }
 964                 $input_params{'hash_base'} ||= $refname;
 965                 $input_params{'file_name'} ||= $pathname;
 966         } elsif (defined $refname) {
 967                 # we got "branch". In this case we have to choose if we have to
 968                 # set hash or hash_base.
 969                 #
 970                 # Most of the actions without a pathname only want hash to be
 971                 # set, except for the ones specified in @wants_base that want
 972                 # hash_base instead. It should also be noted that hand-crafted
 973                 # links having 'history' as an action and no pathname or hash
 974                 # set will fail, but that happens regardless of PATH_INFO.
 975                 if (defined $parentrefname) {
 976                         # if there is parent let the default be 'shortlog' action
 977                         # (for http://git.example.com/repo.git/A..B links); if there
 978                         # is no parent, dispatch will detect type of object and set
 979                         # action appropriately if required (if action is not set)
 980                         $input_params{'action'} ||= "shortlog";
 981                 }
 982                 if ($input_params{'action'} &&
 983                     grep { $_ eq $input_params{'action'} } @wants_base) {
 984                         $input_params{'hash_base'} ||= $refname;
 985                 } else {
 986                         $input_params{'hash'} ||= $refname;
 987                 }
 988         }
 989
 990         # next, handle the 'parent' part, if present
 991         if (defined $parentrefname) {
 992                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 993                 # someproject/blobdiff/oldrev..newrev:/filename
 994                 if ($parentpathname) {
 995                         $parentpathname =~ s,^/+,,;
 996                         $parentpathname =~ s,/$,,;
 997                         $input_params{'file_parent'} ||= $parentpathname;
 998                 } else {
 999                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1000                 }
1001                 # we assume that hash_parent_base is wanted if a path was specified,
1002                 # or if the action wants hash_base instead of hash
1003                 if (defined $input_params{'file_parent'} ||
1004                         grep { $_ eq $input_params{'action'} } @wants_base) {
1005                         $input_params{'hash_parent_base'} ||= $parentrefname;
1006                 } else {
1007                         $input_params{'hash_parent'} ||= $parentrefname;
1008                 }
1009         }
1010
1011         # for the snapshot action, we allow URLs in the form
1012         # $project/snapshot/$hash.ext
1013         # where .ext determines the snapshot and gets removed from the
1014         # passed $refname to provide the $hash.
1015         #
1016         # To be able to tell that $refname includes the format extension, we
1017         # require the following two conditions to be satisfied:
1018         # - the hash input parameter MUST have been set from the $refname part
1019         #   of the URL (i.e. they must be equal)
1020         # - the snapshot format MUST NOT have been defined already (e.g. from
1021         #   CGI parameter sf)
1022         # It's also useless to try any matching unless $refname has a dot,
1023         # so we check for that too
1024         if (defined $input_params{'action'} &&
1025                 $input_params{'action'} eq 'snapshot' &&
1026                 defined $refname && index($refname, '.') != -1 &&
1027                 $refname eq $input_params{'hash'} &&
1028                 !defined $input_params{'snapshot_format'}) {
1029                 # We loop over the known snapshot formats, checking for
1030                 # extensions. Allowed extensions are both the defined suffix
1031                 # (which includes the initial dot already) and the snapshot
1032                 # format key itself, with a prepended dot
1033                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1034                         my $hash = $refname;
1035                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1036                                 next;
1037                         }
1038                         my $sfx = $1;
1039                         # a valid suffix was found, so set the snapshot format
1040                         # and reset the hash parameter
1041                         $input_params{'snapshot_format'} = $fmt;
1042                         $input_params{'hash'} = $hash;
1043                         # we also set the format suffix to the one requested
1044                         # in the URL: this way a request for e.g. .tgz returns
1045                         # a .tgz instead of a .tar.gz
1046                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1047                         last;
1048                 }
1049         }
1050 }
1051
1052 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1053      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1054      $searchtext, $search_regexp, $project_filter);
1055 sub evaluate_and_validate_params {
1056         our $action = $input_params{'action'};
1057         if (defined $action) {
1058                 if (!is_valid_action($action)) {
1059                         die_error(400, "Invalid action parameter");
1060                 }
1061         }
1062
1063         # parameters which are pathnames
1064         our $project = $input_params{'project'};
1065         if (defined $project) {
1066                 if (!is_valid_project($project)) {
1067                         undef $project;
1068                         die_error(404, "No such project");
1069                 }
1070         }
1071
1072         our $project_filter = $input_params{'project_filter'};
1073         if (defined $project_filter) {
1074                 if (!is_valid_pathname($project_filter)) {
1075                         die_error(404, "Invalid project_filter parameter");
1076                 }
1077         }
1078
1079         our $file_name = $input_params{'file_name'};
1080         if (defined $file_name) {
1081                 if (!is_valid_pathname($file_name)) {
1082                         die_error(400, "Invalid file parameter");
1083                 }
1084         }
1085
1086         our $file_parent = $input_params{'file_parent'};
1087         if (defined $file_parent) {
1088                 if (!is_valid_pathname($file_parent)) {
1089                         die_error(400, "Invalid file parent parameter");
1090                 }
1091         }
1092
1093         # parameters which are refnames
1094         our $hash = $input_params{'hash'};
1095         if (defined $hash) {
1096                 if (!is_valid_refname($hash)) {
1097                         die_error(400, "Invalid hash parameter");
1098                 }
1099         }
1100
1101         our $hash_parent = $input_params{'hash_parent'};
1102         if (defined $hash_parent) {
1103                 if (!is_valid_refname($hash_parent)) {
1104                         die_error(400, "Invalid hash parent parameter");
1105                 }
1106         }
1107
1108         our $hash_base = $input_params{'hash_base'};
1109         if (defined $hash_base) {
1110                 if (!is_valid_refname($hash_base)) {
1111                         die_error(400, "Invalid hash base parameter");
1112                 }
1113         }
1114
1115         our @extra_options = @{$input_params{'extra_options'}};
1116         # @extra_options is always defined, since it can only be (currently) set from
1117         # CGI, and $cgi->param() returns the empty array in array context if the param
1118         # is not set
1119         foreach my $opt (@extra_options) {
1120                 if (not exists $allowed_options{$opt}) {
1121                         die_error(400, "Invalid option parameter");
1122                 }
1123                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1124                         die_error(400, "Invalid option parameter for this action");
1125                 }
1126         }
1127
1128         our $hash_parent_base = $input_params{'hash_parent_base'};
1129         if (defined $hash_parent_base) {
1130                 if (!is_valid_refname($hash_parent_base)) {
1131                         die_error(400, "Invalid hash parent base parameter");
1132                 }
1133         }
1134
1135         # other parameters
1136         our $page = $input_params{'page'};
1137         if (defined $page) {
1138                 if ($page =~ m/[^0-9]/) {
1139                         die_error(400, "Invalid page parameter");
1140                 }
1141         }
1142
1143         our $searchtype = $input_params{'searchtype'};
1144         if (defined $searchtype) {
1145                 if ($searchtype =~ m/[^a-z]/) {
1146                         die_error(400, "Invalid searchtype parameter");
1147                 }
1148         }
1149
1150         our $search_use_regexp = $input_params{'search_use_regexp'};
1151
1152         our $searchtext = $input_params{'searchtext'};
1153         our $search_regexp = undef;
1154         if (defined $searchtext) {
1155                 if (length($searchtext) < 2) {
1156                         die_error(403, "At least two characters are required for search parameter");
1157                 }
1158                 if ($search_use_regexp) {
1159                         $search_regexp = $searchtext;
1160                         if (!eval { qr/$search_regexp/; 1; }) {
1161                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1162                                 die_error(400, "Invalid search regexp '$search_regexp'",
1163                                           esc_html($error));
1164                         }
1165                 } else {
1166                         $search_regexp = quotemeta $searchtext;
1167                 }
1168         }
1169 }
1170
1171 # path to the current git repository
1172 our $git_dir;
1173 sub evaluate_git_dir {
1174         our $git_dir = "$projectroot/$project" if $project;
1175 }
1176
1177 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1178 sub configure_gitweb_features {
1179         # list of supported snapshot formats
1180         our @snapshot_fmts = gitweb_get_feature('snapshot');
1181         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1182
1183         # check that the avatar feature is set to a known provider name,
1184         # and for each provider check if the dependencies are satisfied.
1185         # if the provider name is invalid or the dependencies are not met,
1186         # reset $git_avatar to the empty string.
1187         our ($git_avatar) = gitweb_get_feature('avatar');
1188         if ($git_avatar eq 'gravatar') {
1189                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1190         } elsif ($git_avatar eq 'picon') {
1191                 # no dependencies
1192         } else {
1193                 $git_avatar = '';
1194         }
1195
1196         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1197         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1198 }
1199
1200 sub get_branch_refs {
1201         return ('heads', @extra_branch_refs);
1202 }
1203
1204 # custom error handler: 'die <message>' is Internal Server Error
1205 sub handle_errors_html {
1206         my $msg = shift; # it is already HTML escaped
1207
1208         # to avoid infinite loop where error occurs in die_error,
1209         # change handler to default handler, disabling handle_errors_html
1210         set_message("Error occurred when inside die_error:\n$msg");
1211
1212         # you cannot jump out of die_error when called as error handler;
1213         # the subroutine set via CGI::Carp::set_message is called _after_
1214         # HTTP headers are already written, so it cannot write them itself
1215         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1216 }
1217 set_message(\&handle_errors_html);
1218
1219 # dispatch
1220 sub dispatch {
1221         if (!defined $action) {
1222                 if (defined $hash) {
1223                         $action = git_get_type($hash);
1224                         $action or die_error(404, "Object does not exist");
1225                 } elsif (defined $hash_base && defined $file_name) {
1226                         $action = git_get_type("$hash_base:$file_name");
1227                         $action or die_error(404, "File or directory does not exist");
1228                 } elsif (defined $project) {
1229                         $action = 'summary';
1230                 } else {
1231                         $action = 'project_list';
1232                 }
1233         }
1234         if (!defined($actions{$action})) {
1235                 die_error(400, "Unknown action");
1236         }
1237         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1238             !$project) {
1239                 die_error(400, "Project needed");
1240         }
1241         $actions{$action}->();
1242 }
1243
1244 sub reset_timer {
1245         our $t0 = [ gettimeofday() ]
1246                 if defined $t0;
1247         our $number_of_git_cmds = 0;
1248 }
1249
1250 our $first_request = 1;
1251 sub run_request {
1252         reset_timer();
1253
1254         evaluate_uri();
1255         if ($first_request) {
1256                 evaluate_gitweb_config();
1257                 evaluate_git_version();
1258         }
1259         if ($per_request_config) {
1260                 if (ref($per_request_config) eq 'CODE') {
1261                         $per_request_config->();
1262                 } elsif (!$first_request) {
1263                         evaluate_gitweb_config();
1264                 }
1265         }
1266         check_loadavg();
1267
1268         # $projectroot and $projects_list might be set in gitweb config file
1269         $projects_list ||= $projectroot;
1270
1271         evaluate_query_params();
1272         evaluate_path_info();
1273         evaluate_and_validate_params();
1274         evaluate_git_dir();
1275
1276         configure_gitweb_features();
1277
1278         dispatch();
1279 }
1280
1281 our $is_last_request = sub { 1 };
1282 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1283 our $CGI = 'CGI';
1284 our $cgi;
1285 sub configure_as_fcgi {
1286         require CGI::Fast;
1287         our $CGI = 'CGI::Fast';
1288
1289         my $request_number = 0;
1290         # let each child service 100 requests
1291         our $is_last_request = sub { ++$request_number > 100 };
1292 }
1293 sub evaluate_argv {
1294         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1295         configure_as_fcgi()
1296                 if $script_name =~ /\.fcgi$/;
1297
1298         return unless (@ARGV);
1299
1300         require Getopt::Long;
1301         Getopt::Long::GetOptions(
1302                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1303                 'nproc|n=i' => sub {
1304                         my ($arg, $val) = @_;
1305                         return unless eval { require FCGI::ProcManager; 1; };
1306                         my $proc_manager = FCGI::ProcManager->new({
1307                                 n_processes => $val,
1308                         });
1309                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1310                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1311                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1312                 },
1313         );
1314 }
1315
1316 sub run {
1317         evaluate_argv();
1318
1319         $first_request = 1;
1320         $pre_listen_hook->()
1321                 if $pre_listen_hook;
1322
1323  REQUEST:
1324         while ($cgi = $CGI->new()) {
1325                 $pre_dispatch_hook->()
1326                         if $pre_dispatch_hook;
1327
1328                 run_request();
1329
1330                 $post_dispatch_hook->()
1331                         if $post_dispatch_hook;
1332                 $first_request = 0;
1333
1334                 last REQUEST if ($is_last_request->());
1335         }
1336
1337  DONE_GITWEB:
1338         1;
1339 }
1340
1341 run();
1342
1343 if (defined caller) {
1344         # wrapped in a subroutine processing requests,
1345         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1346         return;
1347 } else {
1348         # pure CGI script, serving single request
1349         exit;
1350 }
1351
1352 ## ======================================================================
1353 ## action links
1354
1355 # possible values of extra options
1356 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1357 # -replay => 1      - start from a current view (replay with modifications)
1358 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1359 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1360 sub href {
1361         my %params = @_;
1362         # default is to use -absolute url() i.e. $my_uri
1363         my $href = $params{-full} ? $my_url : $my_uri;
1364
1365         # implicit -replay, must be first of implicit params
1366         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1367
1368         $params{'project'} = $project unless exists $params{'project'};
1369
1370         if ($params{-replay}) {
1371                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1372                         if (!exists $params{$name}) {
1373                                 $params{$name} = $input_params{$name};
1374                         }
1375                 }
1376         }
1377
1378         my $use_pathinfo = gitweb_check_feature('pathinfo');
1379         if (defined $params{'project'} &&
1380             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1381                 # try to put as many parameters as possible in PATH_INFO:
1382                 #   - project name
1383                 #   - action
1384                 #   - hash_parent or hash_parent_base:/file_parent
1385                 #   - hash or hash_base:/filename
1386                 #   - the snapshot_format as an appropriate suffix
1387
1388                 # When the script is the root DirectoryIndex for the domain,
1389                 # $href here would be something like http://gitweb.example.com/
1390                 # Thus, we strip any trailing / from $href, to spare us double
1391                 # slashes in the final URL
1392                 $href =~ s,/$,,;
1393
1394                 # Then add the project name, if present
1395                 $href .= "/".esc_path_info($params{'project'});
1396                 delete $params{'project'};
1397
1398                 # since we destructively absorb parameters, we keep this
1399                 # boolean that remembers if we're handling a snapshot
1400                 my $is_snapshot = $params{'action'} eq 'snapshot';
1401
1402                 # Summary just uses the project path URL, any other action is
1403                 # added to the URL
1404                 if (defined $params{'action'}) {
1405                         $href .= "/".esc_path_info($params{'action'})
1406                                 unless $params{'action'} eq 'summary';
1407                         delete $params{'action'};
1408                 }
1409
1410                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1411                 # stripping nonexistent or useless pieces
1412                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1413                         || $params{'hash_parent'} || $params{'hash'});
1414                 if (defined $params{'hash_base'}) {
1415                         if (defined $params{'hash_parent_base'}) {
1416                                 $href .= esc_path_info($params{'hash_parent_base'});
1417                                 # skip the file_parent if it's the same as the file_name
1418                                 if (defined $params{'file_parent'}) {
1419                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1420                                                 delete $params{'file_parent'};
1421                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1422                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1423                                                 delete $params{'file_parent'};
1424                                         }
1425                                 }
1426                                 $href .= "..";
1427                                 delete $params{'hash_parent'};
1428                                 delete $params{'hash_parent_base'};
1429                         } elsif (defined $params{'hash_parent'}) {
1430                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1431                                 delete $params{'hash_parent'};
1432                         }
1433
1434                         $href .= esc_path_info($params{'hash_base'});
1435                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1436                                 $href .= ":/".esc_path_info($params{'file_name'});
1437                                 delete $params{'file_name'};
1438                         }
1439                         delete $params{'hash'};
1440                         delete $params{'hash_base'};
1441                 } elsif (defined $params{'hash'}) {
1442                         $href .= esc_path_info($params{'hash'});
1443                         delete $params{'hash'};
1444                 }
1445
1446                 # If the action was a snapshot, we can absorb the
1447                 # snapshot_format parameter too
1448                 if ($is_snapshot) {
1449                         my $fmt = $params{'snapshot_format'};
1450                         # snapshot_format should always be defined when href()
1451                         # is called, but just in case some code forgets, we
1452                         # fall back to the default
1453                         $fmt ||= $snapshot_fmts[0];
1454                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1455                         delete $params{'snapshot_format'};
1456                 }
1457         }
1458
1459         # now encode the parameters explicitly
1460         my @result = ();
1461         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1462                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1463                 if (defined $params{$name}) {
1464                         if (ref($params{$name}) eq "ARRAY") {
1465                                 foreach my $par (@{$params{$name}}) {
1466                                         push @result, $symbol . "=" . esc_param($par);
1467                                 }
1468                         } else {
1469                                 push @result, $symbol . "=" . esc_param($params{$name});
1470                         }
1471                 }
1472         }
1473         $href .= "?" . join(';', @result) if scalar @result;
1474
1475         # final transformation: trailing spaces must be escaped (URI-encoded)
1476         $href =~ s/(\s+)$/CGI::escape($1)/e;
1477
1478         if ($params{-anchor}) {
1479                 $href .= "#".esc_param($params{-anchor});
1480         }
1481
1482         return $href;
1483 }
1484
1485
1486 ## ======================================================================
1487 ## validation, quoting/unquoting and escaping
1488
1489 sub is_valid_action {
1490         my $input = shift;
1491         return undef unless exists $actions{$input};
1492         return 1;
1493 }
1494
1495 sub is_valid_project {
1496         my $input = shift;
1497
1498         return unless defined $input;
1499         if (!is_valid_pathname($input) ||
1500                 !(-d "$projectroot/$input") ||
1501                 !check_export_ok("$projectroot/$input") ||
1502                 ($strict_export && !project_in_list($input))) {
1503                 return undef;
1504         } else {
1505                 return 1;
1506         }
1507 }
1508
1509 sub is_valid_pathname {
1510         my $input = shift;
1511
1512         return undef unless defined $input;
1513         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1514         # at the beginning, at the end, and between slashes.
1515         # also this catches doubled slashes
1516         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1517                 return undef;
1518         }
1519         # no null characters
1520         if ($input =~ m!\0!) {
1521                 return undef;
1522         }
1523         return 1;
1524 }
1525
1526 sub is_valid_ref_format {
1527         my $input = shift;
1528
1529         return undef unless defined $input;
1530         # restrictions on ref name according to git-check-ref-format
1531         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1532                 return undef;
1533         }
1534         return 1;
1535 }
1536
1537 sub is_valid_refname {
1538         my $input = shift;
1539
1540         return undef unless defined $input;
1541         # textual hashes are O.K.
1542         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1543                 return 1;
1544         }
1545         # it must be correct pathname
1546         is_valid_pathname($input) or return undef;
1547         # check git-check-ref-format restrictions
1548         is_valid_ref_format($input) or return undef;
1549         return 1;
1550 }
1551
1552 # decode sequences of octets in utf8 into Perl's internal form,
1553 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1554 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1555 sub to_utf8 {
1556         my $str = shift;
1557         return undef unless defined $str;
1558
1559         if (utf8::is_utf8($str) || utf8::decode($str)) {
1560                 return $str;
1561         } else {
1562                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1563         }
1564 }
1565
1566 # quote unsafe chars, but keep the slash, even when it's not
1567 # correct, but quoted slashes look too horrible in bookmarks
1568 sub esc_param {
1569         my $str = shift;
1570         return undef unless defined $str;
1571         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1572         $str =~ s/ /\+/g;
1573         return $str;
1574 }
1575
1576 # the quoting rules for path_info fragment are slightly different
1577 sub esc_path_info {
1578         my $str = shift;
1579         return undef unless defined $str;
1580
1581         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1582         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1583
1584         return $str;
1585 }
1586
1587 # quote unsafe chars in whole URL, so some characters cannot be quoted
1588 sub esc_url {
1589         my $str = shift;
1590         return undef unless defined $str;
1591         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1592         $str =~ s/ /\+/g;
1593         return $str;
1594 }
1595
1596 # quote unsafe characters in HTML attributes
1597 sub esc_attr {
1598
1599         # for XHTML conformance escaping '"' to '&quot;' is not enough
1600         return esc_html(@_);
1601 }
1602
1603 # replace invalid utf8 character with SUBSTITUTION sequence
1604 sub esc_html {
1605         my $str = shift;
1606         my %opts = @_;
1607
1608         return undef unless defined $str;
1609
1610         $str = to_utf8($str);
1611         $str = $cgi->escapeHTML($str);
1612         if ($opts{'-nbsp'}) {
1613                 $str =~ s/ /&nbsp;/g;
1614         }
1615         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1616         return $str;
1617 }
1618
1619 # quote control characters and escape filename to HTML
1620 sub esc_path {
1621         my $str = shift;
1622         my %opts = @_;
1623
1624         return undef unless defined $str;
1625
1626         $str = to_utf8($str);
1627         $str = $cgi->escapeHTML($str);
1628         if ($opts{'-nbsp'}) {
1629                 $str =~ s/ /&nbsp;/g;
1630         }
1631         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1632         return $str;
1633 }
1634
1635 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1636 sub sanitize {
1637         my $str = shift;
1638
1639         return undef unless defined $str;
1640
1641         $str = to_utf8($str);
1642         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1643         return $str;
1644 }
1645
1646 # Make control characters "printable", using character escape codes (CEC)
1647 sub quot_cec {
1648         my $cntrl = shift;
1649         my %opts = @_;
1650         my %es = ( # character escape codes, aka escape sequences
1651                 "\t" => '\t',   # tab            (HT)
1652                 "\n" => '\n',   # line feed      (LF)
1653                 "\r" => '\r',   # carrige return (CR)
1654                 "\f" => '\f',   # form feed      (FF)
1655                 "\b" => '\b',   # backspace      (BS)
1656                 "\a" => '\a',   # alarm (bell)   (BEL)
1657                 "\e" => '\e',   # escape         (ESC)
1658                 "\013" => '\v', # vertical tab   (VT)
1659                 "\000" => '\0', # nul character  (NUL)
1660         );
1661         my $chr = ( (exists $es{$cntrl})
1662                     ? $es{$cntrl}
1663                     : sprintf('\%2x', ord($cntrl)) );
1664         if ($opts{-nohtml}) {
1665                 return $chr;
1666         } else {
1667                 return "<span class=\"cntrl\">$chr</span>";
1668         }
1669 }
1670
1671 # Alternatively use unicode control pictures codepoints,
1672 # Unicode "printable representation" (PR)
1673 sub quot_upr {
1674         my $cntrl = shift;
1675         my %opts = @_;
1676
1677         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1678         if ($opts{-nohtml}) {
1679                 return $chr;
1680         } else {
1681                 return "<span class=\"cntrl\">$chr</span>";
1682         }
1683 }
1684
1685 # git may return quoted and escaped filenames
1686 sub unquote {
1687         my $str = shift;
1688
1689         sub unq {
1690                 my $seq = shift;
1691                 my %es = ( # character escape codes, aka escape sequences
1692                         't' => "\t",   # tab            (HT, TAB)
1693                         'n' => "\n",   # newline        (NL)
1694                         'r' => "\r",   # return         (CR)
1695                         'f' => "\f",   # form feed      (FF)
1696                         'b' => "\b",   # backspace      (BS)
1697                         'a' => "\a",   # alarm (bell)   (BEL)
1698                         'e' => "\e",   # escape         (ESC)
1699                         'v' => "\013", # vertical tab   (VT)
1700                 );
1701
1702                 if ($seq =~ m/^[0-7]{1,3}$/) {
1703                         # octal char sequence
1704                         return chr(oct($seq));
1705                 } elsif (exists $es{$seq}) {
1706                         # C escape sequence, aka character escape code
1707                         return $es{$seq};
1708                 }
1709                 # quoted ordinary character
1710                 return $seq;
1711         }
1712
1713         if ($str =~ m/^"(.*)"$/) {
1714                 # needs unquoting
1715                 $str = $1;
1716                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1717         }
1718         return $str;
1719 }
1720
1721 # escape tabs (convert tabs to spaces)
1722 sub untabify {
1723         my $line = shift;
1724
1725         while ((my $pos = index($line, "\t")) != -1) {
1726                 if (my $count = (8 - ($pos % 8))) {
1727                         my $spaces = ' ' x $count;
1728                         $line =~ s/\t/$spaces/;
1729                 }
1730         }
1731
1732         return $line;
1733 }
1734
1735 sub project_in_list {
1736         my $project = shift;
1737         my @list = git_get_projects_list();
1738         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1739 }
1740
1741 ## ----------------------------------------------------------------------
1742 ## HTML aware string manipulation
1743
1744 # Try to chop given string on a word boundary between position
1745 # $len and $len+$add_len. If there is no word boundary there,
1746 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1747 # (marking chopped part) would be longer than given string.
1748 sub chop_str {
1749         my $str = shift;
1750         my $len = shift;
1751         my $add_len = shift || 10;
1752         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1753
1754         # Make sure perl knows it is utf8 encoded so we don't
1755         # cut in the middle of a utf8 multibyte char.
1756         $str = to_utf8($str);
1757
1758         # allow only $len chars, but don't cut a word if it would fit in $add_len
1759         # if it doesn't fit, cut it if it's still longer than the dots we would add
1760         # remove chopped character entities entirely
1761
1762         # when chopping in the middle, distribute $len into left and right part
1763         # return early if chopping wouldn't make string shorter
1764         if ($where eq 'center') {
1765                 return $str if ($len + 5 >= length($str)); # filler is length 5
1766                 $len = int($len/2);
1767         } else {
1768                 return $str if ($len + 4 >= length($str)); # filler is length 4
1769         }
1770
1771         # regexps: ending and beginning with word part up to $add_len
1772         my $endre = qr/.{$len}\w{0,$add_len}/;
1773         my $begre = qr/\w{0,$add_len}.{$len}/;
1774
1775         if ($where eq 'left') {
1776                 $str =~ m/^(.*?)($begre)$/;
1777                 my ($lead, $body) = ($1, $2);
1778                 if (length($lead) > 4) {
1779                         $lead = " ...";
1780                 }
1781                 return "$lead$body";
1782
1783         } elsif ($where eq 'center') {
1784                 $str =~ m/^($endre)(.*)$/;
1785                 my ($left, $str)  = ($1, $2);
1786                 $str =~ m/^(.*?)($begre)$/;
1787                 my ($mid, $right) = ($1, $2);
1788                 if (length($mid) > 5) {
1789                         $mid = " ... ";
1790                 }
1791                 return "$left$mid$right";
1792
1793         } else {
1794                 $str =~ m/^($endre)(.*)$/;
1795                 my $body = $1;
1796                 my $tail = $2;
1797                 if (length($tail) > 4) {
1798                         $tail = "... ";
1799                 }
1800                 return "$body$tail";
1801         }
1802 }
1803
1804 # takes the same arguments as chop_str, but also wraps a <span> around the
1805 # result with a title attribute if it does get chopped. Additionally, the
1806 # string is HTML-escaped.
1807 sub chop_and_escape_str {
1808         my ($str) = @_;
1809
1810         my $chopped = chop_str(@_);
1811         $str = to_utf8($str);
1812         if ($chopped eq $str) {
1813                 return esc_html($chopped);
1814         } else {
1815                 $str =~ s/[[:cntrl:]]/?/g;
1816                 return $cgi->span({-title=>$str}, esc_html($chopped));
1817         }
1818 }
1819
1820 # Highlight selected fragments of string, using given CSS class,
1821 # and escape HTML.  It is assumed that fragments do not overlap.
1822 # Regions are passed as list of pairs (array references).
1823 #
1824 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1825 # '<span class="mark">foo</span>bar'
1826 sub esc_html_hl_regions {
1827         my ($str, $css_class, @sel) = @_;
1828         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1829         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1830         return esc_html($str, %opts) unless @sel;
1831
1832         my $out = '';
1833         my $pos = 0;
1834
1835         for my $s (@sel) {
1836                 my ($begin, $end) = @$s;
1837
1838                 # Don't create empty <span> elements.
1839                 next if $end <= $begin;
1840
1841                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1842                                        %opts);
1843
1844                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1845                         if ($begin - $pos > 0);
1846                 $out .= $cgi->span({-class => $css_class}, $escaped);
1847
1848                 $pos = $end;
1849         }
1850         $out .= esc_html(substr($str, $pos), %opts)
1851                 if ($pos < length($str));
1852
1853         return $out;
1854 }
1855
1856 # return positions of beginning and end of each match
1857 sub matchpos_list {
1858         my ($str, $regexp) = @_;
1859         return unless (defined $str && defined $regexp);
1860
1861         my @matches;
1862         while ($str =~ /$regexp/g) {
1863                 push @matches, [$-[0], $+[0]];
1864         }
1865         return @matches;
1866 }
1867
1868 # highlight match (if any), and escape HTML
1869 sub esc_html_match_hl {
1870         my ($str, $regexp) = @_;
1871         return esc_html($str) unless defined $regexp;
1872
1873         my @matches = matchpos_list($str, $regexp);
1874         return esc_html($str) unless @matches;
1875
1876         return esc_html_hl_regions($str, 'match', @matches);
1877 }
1878
1879
1880 # highlight match (if any) of shortened string, and escape HTML
1881 sub esc_html_match_hl_chopped {
1882         my ($str, $chopped, $regexp) = @_;
1883         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1884
1885         my @matches = matchpos_list($str, $regexp);
1886         return esc_html($chopped) unless @matches;
1887
1888         # filter matches so that we mark chopped string
1889         my $tail = "... "; # see chop_str
1890         unless ($chopped =~ s/\Q$tail\E$//) {
1891                 $tail = '';
1892         }
1893         my $chop_len = length($chopped);
1894         my $tail_len = length($tail);
1895         my @filtered;
1896
1897         for my $m (@matches) {
1898                 if ($m->[0] > $chop_len) {
1899                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1900                         last;
1901                 } elsif ($m->[1] > $chop_len) {
1902                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1903                         last;
1904                 }
1905                 push @filtered, $m;
1906         }
1907
1908         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1909 }
1910
1911 ## ----------------------------------------------------------------------
1912 ## functions returning short strings
1913
1914 # CSS class for given age value (in seconds)
1915 sub age_class {
1916         my $age = shift;
1917
1918         if (!defined $age) {
1919                 return "noage";
1920         } elsif ($age < 60*60*2) {
1921                 return "age0";
1922         } elsif ($age < 60*60*24*2) {
1923                 return "age1";
1924         } else {
1925                 return "age2";
1926         }
1927 }
1928
1929 # convert age in seconds to "nn units ago" string
1930 sub age_string {
1931         my $age = shift;
1932         my $age_str;
1933
1934         if ($age > 60*60*24*365*2) {
1935                 $age_str = (int $age/60/60/24/365);
1936                 $age_str .= " years ago";
1937         } elsif ($age > 60*60*24*(365/12)*2) {
1938                 $age_str = int $age/60/60/24/(365/12);
1939                 $age_str .= " months ago";
1940         } elsif ($age > 60*60*24*7*2) {
1941                 $age_str = int $age/60/60/24/7;
1942                 $age_str .= " weeks ago";
1943         } elsif ($age > 60*60*24*2) {
1944                 $age_str = int $age/60/60/24;
1945                 $age_str .= " days ago";
1946         } elsif ($age > 60*60*2) {
1947                 $age_str = int $age/60/60;
1948                 $age_str .= " hours ago";
1949         } elsif ($age > 60*2) {
1950                 $age_str = int $age/60;
1951                 $age_str .= " min ago";
1952         } elsif ($age > 2) {
1953                 $age_str = int $age;
1954                 $age_str .= " sec ago";
1955         } else {
1956                 $age_str .= " right now";
1957         }
1958         return $age_str;
1959 }
1960
1961 use constant {
1962         S_IFINVALID => 0030000,
1963         S_IFGITLINK => 0160000,
1964 };
1965
1966 # submodule/subproject, a commit object reference
1967 sub S_ISGITLINK {
1968         my $mode = shift;
1969
1970         return (($mode & S_IFMT) == S_IFGITLINK)
1971 }
1972
1973 # convert file mode in octal to symbolic file mode string
1974 sub mode_str {
1975         my $mode = oct shift;
1976
1977         if (S_ISGITLINK($mode)) {
1978                 return 'm---------';
1979         } elsif (S_ISDIR($mode & S_IFMT)) {
1980                 return 'drwxr-xr-x';
1981         } elsif (S_ISLNK($mode)) {
1982                 return 'lrwxrwxrwx';
1983         } elsif (S_ISREG($mode)) {
1984                 # git cares only about the executable bit
1985                 if ($mode & S_IXUSR) {
1986                         return '-rwxr-xr-x';
1987                 } else {
1988                         return '-rw-r--r--';
1989                 };
1990         } else {
1991                 return '----------';
1992         }
1993 }
1994
1995 # convert file mode in octal to file type string
1996 sub file_type {
1997         my $mode = shift;
1998
1999         if ($mode !~ m/^[0-7]+$/) {
2000                 return $mode;
2001         } else {
2002                 $mode = oct $mode;
2003         }
2004
2005         if (S_ISGITLINK($mode)) {
2006                 return "submodule";
2007         } elsif (S_ISDIR($mode & S_IFMT)) {
2008                 return "directory";
2009         } elsif (S_ISLNK($mode)) {
2010                 return "symlink";
2011         } elsif (S_ISREG($mode)) {
2012                 return "file";
2013         } else {
2014                 return "unknown";
2015         }
2016 }
2017
2018 # convert file mode in octal to file type description string
2019 sub file_type_long {
2020         my $mode = shift;
2021
2022         if ($mode !~ m/^[0-7]+$/) {
2023                 return $mode;
2024         } else {
2025                 $mode = oct $mode;
2026         }
2027
2028         if (S_ISGITLINK($mode)) {
2029                 return "submodule";
2030         } elsif (S_ISDIR($mode & S_IFMT)) {
2031                 return "directory";
2032         } elsif (S_ISLNK($mode)) {
2033                 return "symlink";
2034         } elsif (S_ISREG($mode)) {
2035                 if ($mode & S_IXUSR) {
2036                         return "executable";
2037                 } else {
2038                         return "file";
2039                 };
2040         } else {
2041                 return "unknown";
2042         }
2043 }
2044
2045
2046 ## ----------------------------------------------------------------------
2047 ## functions returning short HTML fragments, or transforming HTML fragments
2048 ## which don't belong to other sections
2049
2050 # format line of commit message.
2051 sub format_log_line_html {
2052         my $line = shift;
2053
2054         $line = esc_html($line, -nbsp=>1);
2055         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
2056                 $cgi->a({-href => href(action=>"object", hash=>$1),
2057                                         -class => "text"}, $1);
2058         }eg;
2059
2060         return $line;
2061 }
2062
2063 # format marker of refs pointing to given object
2064
2065 # the destination action is chosen based on object type and current context:
2066 # - for annotated tags, we choose the tag view unless it's the current view
2067 #   already, in which case we go to shortlog view
2068 # - for other refs, we keep the current view if we're in history, shortlog or
2069 #   log view, and select shortlog otherwise
2070 sub format_ref_marker {
2071         my ($refs, $id) = @_;
2072         my $markers = '';
2073
2074         if (defined $refs->{$id}) {
2075                 foreach my $ref (@{$refs->{$id}}) {
2076                         # this code exploits the fact that non-lightweight tags are the
2077                         # only indirect objects, and that they are the only objects for which
2078                         # we want to use tag instead of shortlog as action
2079                         my ($type, $name) = qw();
2080                         my $indirect = ($ref =~ s/\^\{\}$//);
2081                         # e.g. tags/v2.6.11 or heads/next
2082                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2083                                 $type = $1;
2084                                 $name = $2;
2085                         } else {
2086                                 $type = "ref";
2087                                 $name = $ref;
2088                         }
2089
2090                         my $class = $type;
2091                         $class .= " indirect" if $indirect;
2092
2093                         my $dest_action = "shortlog";
2094
2095                         if ($indirect) {
2096                                 $dest_action = "tag" unless $action eq "tag";
2097                         } elsif ($action =~ /^(history|(short)?log)$/) {
2098                                 $dest_action = $action;
2099                         }
2100
2101                         my $dest = "";
2102                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2103                         $dest .= $ref;
2104
2105                         my $link = $cgi->a({
2106                                 -href => href(
2107                                         action=>$dest_action,
2108                                         hash=>$dest
2109                                 )}, $name);
2110
2111                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2112                                 $link . "</span>";
2113                 }
2114         }
2115
2116         if ($markers) {
2117                 return ' <span class="refs">'. $markers . '</span>';
2118         } else {
2119                 return "";
2120         }
2121 }
2122
2123 # format, perhaps shortened and with markers, title line
2124 sub format_subject_html {
2125         my ($long, $short, $href, $extra) = @_;
2126         $extra = '' unless defined($extra);
2127
2128         if (length($short) < length($long)) {
2129                 $long =~ s/[[:cntrl:]]/?/g;
2130                 return $cgi->a({-href => $href, -class => "list subject",
2131                                 -title => to_utf8($long)},
2132                        esc_html($short)) . $extra;
2133         } else {
2134                 return $cgi->a({-href => $href, -class => "list subject"},
2135                        esc_html($long)) . $extra;
2136         }
2137 }
2138
2139 # Rather than recomputing the url for an email multiple times, we cache it
2140 # after the first hit. This gives a visible benefit in views where the avatar
2141 # for the same email is used repeatedly (e.g. shortlog).
2142 # The cache is shared by all avatar engines (currently gravatar only), which
2143 # are free to use it as preferred. Since only one avatar engine is used for any
2144 # given page, there's no risk for cache conflicts.
2145 our %avatar_cache = ();
2146
2147 # Compute the picon url for a given email, by using the picon search service over at
2148 # http://www.cs.indiana.edu/picons/search.html
2149 sub picon_url {
2150         my $email = lc shift;
2151         if (!$avatar_cache{$email}) {
2152                 my ($user, $domain) = split('@', $email);
2153                 $avatar_cache{$email} =
2154                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2155                         "$domain/$user/" .
2156                         "users+domains+unknown/up/single";
2157         }
2158         return $avatar_cache{$email};
2159 }
2160
2161 # Compute the gravatar url for a given email, if it's not in the cache already.
2162 # Gravatar stores only the part of the URL before the size, since that's the
2163 # one computationally more expensive. This also allows reuse of the cache for
2164 # different sizes (for this particular engine).
2165 sub gravatar_url {
2166         my $email = lc shift;
2167         my $size = shift;
2168         $avatar_cache{$email} ||=
2169                 "//www.gravatar.com/avatar/" .
2170                         Digest::MD5::md5_hex($email) . "?s=";
2171         return $avatar_cache{$email} . $size;
2172 }
2173
2174 # Insert an avatar for the given $email at the given $size if the feature
2175 # is enabled.
2176 sub git_get_avatar {
2177         my ($email, %opts) = @_;
2178         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2179         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2180         $opts{-size} ||= 'default';
2181         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2182         my $url = "";
2183         if ($git_avatar eq 'gravatar') {
2184                 $url = gravatar_url($email, $size);
2185         } elsif ($git_avatar eq 'picon') {
2186                 $url = picon_url($email);
2187         }
2188         # Other providers can be added by extending the if chain, defining $url
2189         # as needed. If no variant puts something in $url, we assume avatars
2190         # are completely disabled/unavailable.
2191         if ($url) {
2192                 return $pre_white .
2193                        "<img width=\"$size\" " .
2194                             "class=\"avatar\" " .
2195                             "src=\"".esc_url($url)."\" " .
2196                             "alt=\"\" " .
2197                        "/>" . $post_white;
2198         } else {
2199                 return "";
2200         }
2201 }
2202
2203 sub format_search_author {
2204         my ($author, $searchtype, $displaytext) = @_;
2205         my $have_search = gitweb_check_feature('search');
2206
2207         if ($have_search) {
2208                 my $performed = "";
2209                 if ($searchtype eq 'author') {
2210                         $performed = "authored";
2211                 } elsif ($searchtype eq 'committer') {
2212                         $performed = "committed";
2213                 }
2214
2215                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2216                                 searchtext=>$author,
2217                                 searchtype=>$searchtype), class=>"list",
2218                                 title=>"Search for commits $performed by $author"},
2219                                 $displaytext);
2220
2221         } else {
2222                 return $displaytext;
2223         }
2224 }
2225
2226 # format the author name of the given commit with the given tag
2227 # the author name is chopped and escaped according to the other
2228 # optional parameters (see chop_str).
2229 sub format_author_html {
2230         my $tag = shift;
2231         my $co = shift;
2232         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2233         return "<$tag class=\"author\">" .
2234                format_search_author($co->{'author_name'}, "author",
2235                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2236                        $author) .
2237                "</$tag>";
2238 }
2239
2240 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2241 sub format_git_diff_header_line {
2242         my $line = shift;
2243         my $diffinfo = shift;
2244         my ($from, $to) = @_;
2245
2246         if ($diffinfo->{'nparents'}) {
2247                 # combined diff
2248                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2249                 if ($to->{'href'}) {
2250                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2251                                          esc_path($to->{'file'}));
2252                 } else { # file was deleted (no href)
2253                         $line .= esc_path($to->{'file'});
2254                 }
2255         } else {
2256                 # "ordinary" diff
2257                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2258                 if ($from->{'href'}) {
2259                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2260                                          'a/' . esc_path($from->{'file'}));
2261                 } else { # file was added (no href)
2262                         $line .= 'a/' . esc_path($from->{'file'});
2263                 }
2264                 $line .= ' ';
2265                 if ($to->{'href'}) {
2266                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2267                                          'b/' . esc_path($to->{'file'}));
2268                 } else { # file was deleted
2269                         $line .= 'b/' . esc_path($to->{'file'});
2270                 }
2271         }
2272
2273         return "<div class=\"diff header\">$line</div>\n";
2274 }
2275
2276 # format extended diff header line, before patch itself
2277 sub format_extended_diff_header_line {
2278         my $line = shift;
2279         my $diffinfo = shift;
2280         my ($from, $to) = @_;
2281
2282         # match <path>
2283         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2284                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2285                                        esc_path($from->{'file'}));
2286         }
2287         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2288                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2289                                  esc_path($to->{'file'}));
2290         }
2291         # match single <mode>
2292         if ($line =~ m/\s(\d{6})$/) {
2293                 $line .= '<span class="info"> (' .
2294                          file_type_long($1) .
2295                          ')</span>';
2296         }
2297         # match <hash>
2298         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2299                 # can match only for combined diff
2300                 $line = 'index ';
2301                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2302                         if ($from->{'href'}[$i]) {
2303                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2304                                                   -class=>"hash"},
2305                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2306                         } else {
2307                                 $line .= '0' x 7;
2308                         }
2309                         # separator
2310                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2311                 }
2312                 $line .= '..';
2313                 if ($to->{'href'}) {
2314                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2315                                          substr($diffinfo->{'to_id'},0,7));
2316                 } else {
2317                         $line .= '0' x 7;
2318                 }
2319
2320         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2321                 # can match only for ordinary diff
2322                 my ($from_link, $to_link);
2323                 if ($from->{'href'}) {
2324                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2325                                              substr($diffinfo->{'from_id'},0,7));
2326                 } else {
2327                         $from_link = '0' x 7;
2328                 }
2329                 if ($to->{'href'}) {
2330                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2331                                            substr($diffinfo->{'to_id'},0,7));
2332                 } else {
2333                         $to_link = '0' x 7;
2334                 }
2335                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2336                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2337         }
2338
2339         return $line . "<br/>\n";
2340 }
2341
2342 # format from-file/to-file diff header
2343 sub format_diff_from_to_header {
2344         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2345         my $line;
2346         my $result = '';
2347
2348         $line = $from_line;
2349         #assert($line =~ m/^---/) if DEBUG;
2350         # no extra formatting for "^--- /dev/null"
2351         if (! $diffinfo->{'nparents'}) {
2352                 # ordinary (single parent) diff
2353                 if ($line =~ m!^--- "?a/!) {
2354                         if ($from->{'href'}) {
2355                                 $line = '--- a/' .
2356                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2357                                                 esc_path($from->{'file'}));
2358                         } else {
2359                                 $line = '--- a/' .
2360                                         esc_path($from->{'file'});
2361                         }
2362                 }
2363                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2364
2365         } else {
2366                 # combined diff (merge commit)
2367                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2368                         if ($from->{'href'}[$i]) {
2369                                 $line = '--- ' .
2370                                         $cgi->a({-href=>href(action=>"blobdiff",
2371                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2372                                                              hash_parent_base=>$parents[$i],
2373                                                              file_parent=>$from->{'file'}[$i],
2374                                                              hash=>$diffinfo->{'to_id'},
2375                                                              hash_base=>$hash,
2376                                                              file_name=>$to->{'file'}),
2377                                                  -class=>"path",
2378                                                  -title=>"diff" . ($i+1)},
2379                                                 $i+1) .
2380                                         '/' .
2381                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2382                                                 esc_path($from->{'file'}[$i]));
2383                         } else {
2384                                 $line = '--- /dev/null';
2385                         }
2386                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2387                 }
2388         }
2389
2390         $line = $to_line;
2391         #assert($line =~ m/^\+\+\+/) if DEBUG;
2392         # no extra formatting for "^+++ /dev/null"
2393         if ($line =~ m!^\+\+\+ "?b/!) {
2394                 if ($to->{'href'}) {
2395                         $line = '+++ b/' .
2396                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2397                                         esc_path($to->{'file'}));
2398                 } else {
2399                         $line = '+++ b/' .
2400                                 esc_path($to->{'file'});
2401                 }
2402         }
2403         $result .= qq!<div class="diff to_file">$line</div>\n!;
2404
2405         return $result;
2406 }
2407
2408 # create note for patch simplified by combined diff
2409 sub format_diff_cc_simplified {
2410         my ($diffinfo, @parents) = @_;
2411         my $result = '';
2412
2413         $result .= "<div class=\"diff header\">" .
2414                    "diff --cc ";
2415         if (!is_deleted($diffinfo)) {
2416                 $result .= $cgi->a({-href => href(action=>"blob",
2417                                                   hash_base=>$hash,
2418                                                   hash=>$diffinfo->{'to_id'},
2419                                                   file_name=>$diffinfo->{'to_file'}),
2420                                     -class => "path"},
2421                                    esc_path($diffinfo->{'to_file'}));
2422         } else {
2423                 $result .= esc_path($diffinfo->{'to_file'});
2424         }
2425         $result .= "</div>\n" . # class="diff header"
2426                    "<div class=\"diff nodifferences\">" .
2427                    "Simple merge" .
2428                    "</div>\n"; # class="diff nodifferences"
2429
2430         return $result;
2431 }
2432
2433 sub diff_line_class {
2434         my ($line, $from, $to) = @_;
2435
2436         # ordinary diff
2437         my $num_sign = 1;
2438         # combined diff
2439         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2440                 $num_sign = scalar @{$from->{'href'}};
2441         }
2442
2443         my @diff_line_classifier = (
2444                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2445                 { regexp => qr/^\\/,               class => "incomplete"  },
2446                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2447                 # classifier for context must come before classifier add/rem,
2448                 # or we would have to use more complicated regexp, for example
2449                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2450                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2451                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2452         );
2453         for my $clsfy (@diff_line_classifier) {
2454                 return $clsfy->{'class'}
2455                         if ($line =~ $clsfy->{'regexp'});
2456         }
2457
2458         # fallback
2459         return "";
2460 }
2461
2462 # assumes that $from and $to are defined and correctly filled,
2463 # and that $line holds a line of chunk header for unified diff
2464 sub format_unidiff_chunk_header {
2465         my ($line, $from, $to) = @_;
2466
2467         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2468                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2469
2470         $from_lines = 0 unless defined $from_lines;
2471         $to_lines   = 0 unless defined $to_lines;
2472
2473         if ($from->{'href'}) {
2474                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2475                                      -class=>"list"}, $from_text);
2476         }
2477         if ($to->{'href'}) {
2478                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2479                                      -class=>"list"}, $to_text);
2480         }
2481         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2482                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2483         return $line;
2484 }
2485
2486 # assumes that $from and $to are defined and correctly filled,
2487 # and that $line holds a line of chunk header for combined diff
2488 sub format_cc_diff_chunk_header {
2489         my ($line, $from, $to) = @_;
2490
2491         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2492         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2493
2494         @from_text = split(' ', $ranges);
2495         for (my $i = 0; $i < @from_text; ++$i) {
2496                 ($from_start[$i], $from_nlines[$i]) =
2497                         (split(',', substr($from_text[$i], 1)), 0);
2498         }
2499
2500         $to_text   = pop @from_text;
2501         $to_start  = pop @from_start;
2502         $to_nlines = pop @from_nlines;
2503
2504         $line = "<span class=\"chunk_info\">$prefix ";
2505         for (my $i = 0; $i < @from_text; ++$i) {
2506                 if ($from->{'href'}[$i]) {
2507                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2508                                           -class=>"list"}, $from_text[$i]);
2509                 } else {
2510                         $line .= $from_text[$i];
2511                 }
2512                 $line .= " ";
2513         }
2514         if ($to->{'href'}) {
2515                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2516                                   -class=>"list"}, $to_text);
2517         } else {
2518                 $line .= $to_text;
2519         }
2520         $line .= " $prefix</span>" .
2521                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2522         return $line;
2523 }
2524
2525 # process patch (diff) line (not to be used for diff headers),
2526 # returning HTML-formatted (but not wrapped) line.
2527 # If the line is passed as a reference, it is treated as HTML and not
2528 # esc_html()'ed.
2529 sub format_diff_line {
2530         my ($line, $diff_class, $from, $to) = @_;
2531
2532         if (ref($line)) {
2533                 $line = $$line;
2534         } else {
2535                 chomp $line;
2536                 $line = untabify($line);
2537
2538                 if ($from && $to && $line =~ m/^\@{2} /) {
2539                         $line = format_unidiff_chunk_header($line, $from, $to);
2540                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2541                         $line = format_cc_diff_chunk_header($line, $from, $to);
2542                 } else {
2543                         $line = esc_html($line, -nbsp=>1);
2544                 }
2545         }
2546
2547         my $diff_classes = "diff";
2548         $diff_classes .= " $diff_class" if ($diff_class);
2549         $line = "<div class=\"$diff_classes\">$line</div>\n";
2550
2551         return $line;
2552 }
2553
2554 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2555 # linked.  Pass the hash of the tree/commit to snapshot.
2556 sub format_snapshot_links {
2557         my ($hash) = @_;
2558         my $num_fmts = @snapshot_fmts;
2559         if ($num_fmts > 1) {
2560                 # A parenthesized list of links bearing format names.
2561                 # e.g. "snapshot (_tar.gz_ _zip_)"
2562                 return "snapshot (" . join(' ', map
2563                         $cgi->a({
2564                                 -href => href(
2565                                         action=>"snapshot",
2566                                         hash=>$hash,
2567                                         snapshot_format=>$_
2568                                 )
2569                         }, $known_snapshot_formats{$_}{'display'})
2570                 , @snapshot_fmts) . ")";
2571         } elsif ($num_fmts == 1) {
2572                 # A single "snapshot" link whose tooltip bears the format name.
2573                 # i.e. "_snapshot_"
2574                 my ($fmt) = @snapshot_fmts;
2575                 return
2576                         $cgi->a({
2577                                 -href => href(
2578                                         action=>"snapshot",
2579                                         hash=>$hash,
2580                                         snapshot_format=>$fmt
2581                                 ),
2582                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2583                         }, "snapshot");
2584         } else { # $num_fmts == 0
2585                 return undef;
2586         }
2587 }
2588
2589 ## ......................................................................
2590 ## functions returning values to be passed, perhaps after some
2591 ## transformation, to other functions; e.g. returning arguments to href()
2592
2593 # returns hash to be passed to href to generate gitweb URL
2594 # in -title key it returns description of link
2595 sub get_feed_info {
2596         my $format = shift || 'Atom';
2597         my %res = (action => lc($format));
2598         my $matched_ref = 0;
2599
2600         # feed links are possible only for project views
2601         return unless (defined $project);
2602         # some views should link to OPML, or to generic project feed,
2603         # or don't have specific feed yet (so they should use generic)
2604         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2605
2606         my $branch = undef;
2607         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2608         # (fullname) to differentiate from tag links; this also makes
2609         # possible to detect branch links
2610         for my $ref (get_branch_refs()) {
2611                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2612                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2613                         $branch = $1;
2614                         $matched_ref = $ref;
2615                         last;
2616                 }
2617         }
2618         # find log type for feed description (title)
2619         my $type = 'log';
2620         if (defined $file_name) {
2621                 $type  = "history of $file_name";
2622                 $type .= "/" if ($action eq 'tree');
2623                 $type .= " on '$branch'" if (defined $branch);
2624         } else {
2625                 $type = "log of $branch" if (defined $branch);
2626         }
2627
2628         $res{-title} = $type;
2629         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2630         $res{'file_name'} = $file_name;
2631
2632         return %res;
2633 }
2634
2635 ## ----------------------------------------------------------------------
2636 ## git utility subroutines, invoking git commands
2637
2638 # returns path to the core git executable and the --git-dir parameter as list
2639 sub git_cmd {
2640         $number_of_git_cmds++;
2641         return $GIT, '--git-dir='.$git_dir;
2642 }
2643
2644 # quote the given arguments for passing them to the shell
2645 # quote_command("command", "arg 1", "arg with ' and ! characters")
2646 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2647 # Try to avoid using this function wherever possible.
2648 sub quote_command {
2649         return join(' ',
2650                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2651 }
2652
2653 # get HEAD ref of given project as hash
2654 sub git_get_head_hash {
2655         return git_get_full_hash(shift, 'HEAD');
2656 }
2657
2658 sub git_get_full_hash {
2659         return git_get_hash(@_);
2660 }
2661
2662 sub git_get_short_hash {
2663         return git_get_hash(@_, '--short=7');
2664 }
2665
2666 sub git_get_hash {
2667         my ($project, $hash, @options) = @_;
2668         my $o_git_dir = $git_dir;
2669         my $retval = undef;
2670         $git_dir = "$projectroot/$project";
2671         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2672             '--verify', '-q', @options, $hash) {
2673                 $retval = <$fd>;
2674                 chomp $retval if defined $retval;
2675                 close $fd;
2676         }
2677         if (defined $o_git_dir) {
2678                 $git_dir = $o_git_dir;
2679         }
2680         return $retval;
2681 }
2682
2683 # get type of given object
2684 sub git_get_type {
2685         my $hash = shift;
2686
2687         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2688         my $type = <$fd>;
2689         close $fd or return;
2690         chomp $type;
2691         return $type;
2692 }
2693
2694 # repository configuration
2695 our $config_file = '';
2696 our %config;
2697
2698 # store multiple values for single key as anonymous array reference
2699 # single values stored directly in the hash, not as [ <value> ]
2700 sub hash_set_multi {
2701         my ($hash, $key, $value) = @_;
2702
2703         if (!exists $hash->{$key}) {
2704                 $hash->{$key} = $value;
2705         } elsif (!ref $hash->{$key}) {
2706                 $hash->{$key} = [ $hash->{$key}, $value ];
2707         } else {
2708                 push @{$hash->{$key}}, $value;
2709         }
2710 }
2711
2712 # return hash of git project configuration
2713 # optionally limited to some section, e.g. 'gitweb'
2714 sub git_parse_project_config {
2715         my $section_regexp = shift;
2716         my %config;
2717
2718         local $/ = "\0";
2719
2720         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2721                 or return;
2722
2723         while (my $keyval = <$fh>) {
2724                 chomp $keyval;
2725                 my ($key, $value) = split(/\n/, $keyval, 2);
2726
2727                 hash_set_multi(\%config, $key, $value)
2728                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2729         }
2730         close $fh;
2731
2732         return %config;
2733 }
2734
2735 # convert config value to boolean: 'true' or 'false'
2736 # no value, number > 0, 'true' and 'yes' values are true
2737 # rest of values are treated as false (never as error)
2738 sub config_to_bool {
2739         my $val = shift;
2740
2741         return 1 if !defined $val;             # section.key
2742
2743         # strip leading and trailing whitespace
2744         $val =~ s/^\s+//;
2745         $val =~ s/\s+$//;
2746
2747         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2748                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2749 }
2750
2751 # convert config value to simple decimal number
2752 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2753 # to be multiplied by 1024, 1048576, or 1073741824
2754 sub config_to_int {
2755         my $val = shift;
2756
2757         # strip leading and trailing whitespace
2758         $val =~ s/^\s+//;
2759         $val =~ s/\s+$//;
2760
2761         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2762                 $unit = lc($unit);
2763                 # unknown unit is treated as 1
2764                 return $num * ($unit eq 'g' ? 1073741824 :
2765                                $unit eq 'm' ?    1048576 :
2766                                $unit eq 'k' ?       1024 : 1);
2767         }
2768         return $val;
2769 }
2770
2771 # convert config value to array reference, if needed
2772 sub config_to_multi {
2773         my $val = shift;
2774
2775         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2776 }
2777
2778 sub git_get_project_config {
2779         my ($key, $type) = @_;
2780
2781         return unless defined $git_dir;
2782
2783         # key sanity check
2784         return unless ($key);
2785         # only subsection, if exists, is case sensitive,
2786         # and not lowercased by 'git config -z -l'
2787         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2788                 $lo =~ s/_//g;
2789                 $key = join(".", lc($hi), $mi, lc($lo));
2790                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2791         } else {
2792                 $key = lc($key);
2793                 $key =~ s/_//g;
2794                 return if ($key =~ /\W/);
2795         }
2796         $key =~ s/^gitweb\.//;
2797
2798         # type sanity check
2799         if (defined $type) {
2800                 $type =~ s/^--//;
2801                 $type = undef
2802                         unless ($type eq 'bool' || $type eq 'int');
2803         }
2804
2805         # get config
2806         if (!defined $config_file ||
2807             $config_file ne "$git_dir/config") {
2808                 %config = git_parse_project_config('gitweb');
2809                 $config_file = "$git_dir/config";
2810         }
2811
2812         # check if config variable (key) exists
2813         return unless exists $config{"gitweb.$key"};
2814
2815         # ensure given type
2816         if (!defined $type) {
2817                 return $config{"gitweb.$key"};
2818         } elsif ($type eq 'bool') {
2819                 # backward compatibility: 'git config --bool' returns true/false
2820                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2821         } elsif ($type eq 'int') {
2822                 return config_to_int($config{"gitweb.$key"});
2823         }
2824         return $config{"gitweb.$key"};
2825 }
2826
2827 # get hash of given path at given ref
2828 sub git_get_hash_by_path {
2829         my $base = shift;
2830         my $path = shift || return undef;
2831         my $type = shift;
2832
2833         $path =~ s,/+$,,;
2834
2835         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2836                 or die_error(500, "Open git-ls-tree failed");
2837         my $line = <$fd>;
2838         close $fd or return undef;
2839
2840         if (!defined $line) {
2841                 # there is no tree or hash given by $path at $base
2842                 return undef;
2843         }
2844
2845         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2846         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2847         if (defined $type && $type ne $2) {
2848                 # type doesn't match
2849                 return undef;
2850         }
2851         return $3;
2852 }
2853
2854 # get path of entry with given hash at given tree-ish (ref)
2855 # used to get 'from' filename for combined diff (merge commit) for renames
2856 sub git_get_path_by_hash {
2857         my $base = shift || return;
2858         my $hash = shift || return;
2859
2860         local $/ = "\0";
2861
2862         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2863                 or return undef;
2864         while (my $line = <$fd>) {
2865                 chomp $line;
2866
2867                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2868                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2869                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2870                         close $fd;
2871                         return $1;
2872                 }
2873         }
2874         close $fd;
2875         return undef;
2876 }
2877
2878 ## ......................................................................
2879 ## git utility functions, directly accessing git repository
2880
2881 # get the value of config variable either from file named as the variable
2882 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2883 # configuration variable in the repository config file.
2884 sub git_get_file_or_project_config {
2885         my ($path, $name) = @_;
2886
2887         $git_dir = "$projectroot/$path";
2888         open my $fd, '<', "$git_dir/$name"
2889                 or return git_get_project_config($name);
2890         my $conf = <$fd>;
2891         close $fd;
2892         if (defined $conf) {
2893                 chomp $conf;
2894         }
2895         return $conf;
2896 }
2897
2898 sub git_get_project_description {
2899         my $path = shift;
2900         return git_get_file_or_project_config($path, 'description');
2901 }
2902
2903 sub git_get_project_category {
2904         my $path = shift;
2905         return git_get_file_or_project_config($path, 'category');
2906 }
2907
2908
2909 # supported formats:
2910 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2911 #   - if its contents is a number, use it as tag weight,
2912 #   - otherwise add a tag with weight 1
2913 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2914 #   the same value multiple times increases tag weight
2915 # * `gitweb.ctag' multi-valued repo config variable
2916 sub git_get_project_ctags {
2917         my $project = shift;
2918         my $ctags = {};
2919
2920         $git_dir = "$projectroot/$project";
2921         if (opendir my $dh, "$git_dir/ctags") {
2922                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2923                 foreach my $tagfile (@files) {
2924                         open my $ct, '<', $tagfile
2925                                 or next;
2926                         my $val = <$ct>;
2927                         chomp $val if $val;
2928                         close $ct;
2929
2930                         (my $ctag = $tagfile) =~ s#.*/##;
2931                         if ($val =~ /^\d+$/) {
2932                                 $ctags->{$ctag} = $val;
2933                         } else {
2934                                 $ctags->{$ctag} = 1;
2935                         }
2936                 }
2937                 closedir $dh;
2938
2939         } elsif (open my $fh, '<', "$git_dir/ctags") {
2940                 while (my $line = <$fh>) {
2941                         chomp $line;
2942                         $ctags->{$line}++ if $line;
2943                 }
2944                 close $fh;
2945
2946         } else {
2947                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2948                 foreach my $tag (@$taglist) {
2949                         $ctags->{$tag}++;
2950                 }
2951         }
2952
2953         return $ctags;
2954 }
2955
2956 # return hash, where keys are content tags ('ctags'),
2957 # and values are sum of weights of given tag in every project
2958 sub git_gather_all_ctags {
2959         my $projects = shift;
2960         my $ctags = {};
2961
2962         foreach my $p (@$projects) {
2963                 foreach my $ct (keys %{$p->{'ctags'}}) {
2964                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2965                 }
2966         }
2967
2968         return $ctags;
2969 }
2970
2971 sub git_populate_project_tagcloud {
2972         my $ctags = shift;
2973
2974         # First, merge different-cased tags; tags vote on casing
2975         my %ctags_lc;
2976         foreach (keys %$ctags) {
2977                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2978                 if (not $ctags_lc{lc $_}->{topcount}
2979                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2980                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2981                         $ctags_lc{lc $_}->{topname} = $_;
2982                 }
2983         }
2984
2985         my $cloud;
2986         my $matched = $input_params{'ctag'};
2987         if (eval { require HTML::TagCloud; 1; }) {
2988                 $cloud = HTML::TagCloud->new;
2989                 foreach my $ctag (sort keys %ctags_lc) {
2990                         # Pad the title with spaces so that the cloud looks
2991                         # less crammed.
2992                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2993                         $title =~ s/ /&nbsp;/g;
2994                         $title =~ s/^/&nbsp;/g;
2995                         $title =~ s/$/&nbsp;/g;
2996                         if (defined $matched && $matched eq $ctag) {
2997                                 $title = qq(<span class="match">$title</span>);
2998                         }
2999                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
3000                                     $ctags_lc{$ctag}->{count});
3001                 }
3002         } else {
3003                 $cloud = {};
3004                 foreach my $ctag (keys %ctags_lc) {
3005                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3006                         if (defined $matched && $matched eq $ctag) {
3007                                 $title = qq(<span class="match">$title</span>);
3008                         }
3009                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3010                         $cloud->{$ctag}{ctag} =
3011                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3012                 }
3013         }
3014         return $cloud;
3015 }
3016
3017 sub git_show_project_tagcloud {
3018         my ($cloud, $count) = @_;
3019         if (ref $cloud eq 'HTML::TagCloud') {
3020                 return $cloud->html_and_css($count);
3021         } else {
3022                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3023                 return
3024                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3025                         join (', ', map {
3026                                 $cloud->{$_}->{'ctag'}
3027                         } splice(@tags, 0, $count)) .
3028                         '</div>';
3029         }
3030 }
3031
3032 sub git_get_project_url_list {
3033         my $path = shift;
3034
3035         $git_dir = "$projectroot/$path";
3036         open my $fd, '<', "$git_dir/cloneurl"
3037                 or return wantarray ?
3038                 @{ config_to_multi(git_get_project_config('url')) } :
3039                    config_to_multi(git_get_project_config('url'));
3040         my @git_project_url_list = map { chomp; $_ } <$fd>;
3041         close $fd;
3042
3043         return wantarray ? @git_project_url_list : \@git_project_url_list;
3044 }
3045
3046 sub git_get_projects_list {
3047         my $filter = shift || '';
3048         my $paranoid = shift;
3049         my @list;
3050
3051         if (-d $projects_list) {
3052                 # search in directory
3053                 my $dir = $projects_list;
3054                 # remove the trailing "/"
3055                 $dir =~ s!/+$!!;
3056                 my $pfxlen = length("$dir");
3057                 my $pfxdepth = ($dir =~ tr!/!!);
3058                 # when filtering, search only given subdirectory
3059                 if ($filter && !$paranoid) {
3060                         $dir .= "/$filter";
3061                         $dir =~ s!/+$!!;
3062                 }
3063
3064                 File::Find::find({
3065                         follow_fast => 1, # follow symbolic links
3066                         follow_skip => 2, # ignore duplicates
3067                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3068                         wanted => sub {
3069                                 # global variables
3070                                 our $project_maxdepth;
3071                                 our $projectroot;
3072                                 # skip project-list toplevel, if we get it.
3073                                 return if (m!^[/.]$!);
3074                                 # only directories can be git repositories
3075                                 return unless (-d $_);
3076                                 # don't traverse too deep (Find is super slow on os x)
3077                                 # $project_maxdepth excludes depth of $projectroot
3078                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3079                                         $File::Find::prune = 1;
3080                                         return;
3081                                 }
3082
3083                                 my $path = substr($File::Find::name, $pfxlen + 1);
3084                                 # paranoidly only filter here
3085                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3086                                         next;
3087                                 }
3088                                 # we check related file in $projectroot
3089                                 if (check_export_ok("$projectroot/$path")) {
3090                                         push @list, { path => $path };
3091                                         $File::Find::prune = 1;
3092                                 }
3093                         },
3094                 }, "$dir");
3095
3096         } elsif (-f $projects_list) {
3097                 # read from file(url-encoded):
3098                 # 'git%2Fgit.git Linus+Torvalds'
3099                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3100                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3101                 open my $fd, '<', $projects_list or return;
3102         PROJECT:
3103                 while (my $line = <$fd>) {
3104                         chomp $line;
3105                         my ($path, $owner) = split ' ', $line;
3106                         $path = unescape($path);
3107                         $owner = unescape($owner);
3108                         if (!defined $path) {
3109                                 next;
3110                         }
3111                         # if $filter is rpovided, check if $path begins with $filter
3112                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3113                                 next;
3114                         }
3115                         if (check_export_ok("$projectroot/$path")) {
3116                                 my $pr = {
3117                                         path => $path
3118                                 };
3119                                 if ($owner) {
3120                                         $pr->{'owner'} = to_utf8($owner);
3121                                 }
3122                                 push @list, $pr;
3123                         }
3124                 }
3125                 close $fd;
3126         }
3127         return @list;
3128 }
3129
3130 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3131 # as side effects it sets 'forks' field to list of forks for forked projects
3132 sub filter_forks_from_projects_list {
3133         my $projects = shift;
3134
3135         my %trie; # prefix tree of directories (path components)
3136         # generate trie out of those directories that might contain forks
3137         foreach my $pr (@$projects) {
3138                 my $path = $pr->{'path'};
3139                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3140                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3141                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3142                 next unless (-d "$projectroot/$path"); # containing directory exists
3143                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3144
3145                 # add to trie
3146                 my @dirs = split('/', $path);
3147                 # walk the trie, until either runs out of components or out of trie
3148                 my $ref = \%trie;
3149                 while (scalar @dirs &&
3150                        exists($ref->{$dirs[0]})) {
3151                         $ref = $ref->{shift @dirs};
3152                 }
3153                 # create rest of trie structure from rest of components
3154                 foreach my $dir (@dirs) {
3155                         $ref = $ref->{$dir} = {};
3156                 }
3157                 # create end marker, store $pr as a data
3158                 $ref->{''} = $pr if (!exists $ref->{''});
3159         }
3160
3161         # filter out forks, by finding shortest prefix match for paths
3162         my @filtered;
3163  PROJECT:
3164         foreach my $pr (@$projects) {
3165                 # trie lookup
3166                 my $ref = \%trie;
3167         DIR:
3168                 foreach my $dir (split('/', $pr->{'path'})) {
3169                         if (exists $ref->{''}) {
3170                                 # found [shortest] prefix, is a fork - skip it
3171                                 push @{$ref->{''}{'forks'}}, $pr;
3172                                 next PROJECT;
3173                         }
3174                         if (!exists $ref->{$dir}) {
3175                                 # not in trie, cannot have prefix, not a fork
3176                                 push @filtered, $pr;
3177                                 next PROJECT;
3178                         }
3179                         # If the dir is there, we just walk one step down the trie.
3180                         $ref = $ref->{$dir};
3181                 }
3182                 # we ran out of trie
3183                 # (shouldn't happen: it's either no match, or end marker)
3184                 push @filtered, $pr;
3185         }
3186
3187         return @filtered;
3188 }
3189
3190 # note: fill_project_list_info must be run first,
3191 # for 'descr_long' and 'ctags' to be filled
3192 sub search_projects_list {
3193         my ($projlist, %opts) = @_;
3194         my $tagfilter  = $opts{'tagfilter'};
3195         my $search_re = $opts{'search_regexp'};
3196
3197         return @$projlist
3198                 unless ($tagfilter || $search_re);
3199
3200         # searching projects require filling to be run before it;
3201         fill_project_list_info($projlist,
3202                                $tagfilter  ? 'ctags' : (),
3203                                $search_re ? ('path', 'descr') : ());
3204         my @projects;
3205  PROJECT:
3206         foreach my $pr (@$projlist) {
3207
3208                 if ($tagfilter) {
3209                         next unless ref($pr->{'ctags'}) eq 'HASH';
3210                         next unless
3211                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3212                 }
3213
3214                 if ($search_re) {
3215                         next unless
3216                                 $pr->{'path'} =~ /$search_re/ ||
3217                                 $pr->{'descr_long'} =~ /$search_re/;
3218                 }
3219
3220                 push @projects, $pr;
3221         }
3222
3223         return @projects;
3224 }
3225
3226 our $gitweb_project_owner = undef;
3227 sub git_get_project_list_from_file {
3228
3229         return if (defined $gitweb_project_owner);
3230
3231         $gitweb_project_owner = {};
3232         # read from file (url-encoded):
3233         # 'git%2Fgit.git Linus+Torvalds'
3234         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3235         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3236         if (-f $projects_list) {
3237                 open(my $fd, '<', $projects_list);
3238                 while (my $line = <$fd>) {
3239                         chomp $line;
3240                         my ($pr, $ow) = split ' ', $line;
3241                         $pr = unescape($pr);
3242                         $ow = unescape($ow);
3243                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3244                 }
3245                 close $fd;
3246         }
3247 }
3248
3249 sub git_get_project_owner {
3250         my $project = shift;
3251         my $owner;
3252
3253         return undef unless $project;
3254         $git_dir = "$projectroot/$project";
3255
3256         if (!defined $gitweb_project_owner) {
3257                 git_get_project_list_from_file();
3258         }
3259
3260         if (exists $gitweb_project_owner->{$project}) {
3261                 $owner = $gitweb_project_owner->{$project};
3262         }
3263         if (!defined $owner){
3264                 $owner = git_get_project_config('owner');
3265         }
3266         if (!defined $owner) {
3267                 $owner = get_file_owner("$git_dir");
3268         }
3269
3270         return $owner;
3271 }
3272
3273 sub git_get_last_activity {
3274         my ($path) = @_;
3275         my $fd;
3276
3277         $git_dir = "$projectroot/$path";
3278         open($fd, "-|", git_cmd(), 'for-each-ref',
3279              '--format=%(committer)',
3280              '--sort=-committerdate',
3281              '--count=1',
3282              map { "refs/$_" } get_branch_refs ()) or return;
3283         my $most_recent = <$fd>;
3284         close $fd or return;
3285         if (defined $most_recent &&
3286             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3287                 my $timestamp = $1;
3288                 my $age = time - $timestamp;
3289                 return ($age, age_string($age));
3290         }
3291         return (undef, undef);
3292 }
3293
3294 # Implementation note: when a single remote is wanted, we cannot use 'git
3295 # remote show -n' because that command always work (assuming it's a remote URL
3296 # if it's not defined), and we cannot use 'git remote show' because that would
3297 # try to make a network roundtrip. So the only way to find if that particular
3298 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3299 # and when we find what we want.
3300 sub git_get_remotes_list {
3301         my $wanted = shift;
3302         my %remotes = ();
3303
3304         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3305         return unless $fd;
3306         while (my $remote = <$fd>) {
3307                 chomp $remote;
3308                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3309                 next if $wanted and not $remote eq $wanted;
3310                 my ($url, $key) = ($1, $2);
3311
3312                 $remotes{$remote} ||= { 'heads' => () };
3313                 $remotes{$remote}{$key} = $url;
3314         }
3315         close $fd or return;
3316         return wantarray ? %remotes : \%remotes;
3317 }
3318
3319 # Takes a hash of remotes as first parameter and fills it by adding the
3320 # available remote heads for each of the indicated remotes.
3321 sub fill_remote_heads {
3322         my $remotes = shift;
3323         my @heads = map { "remotes/$_" } keys %$remotes;
3324         my @remoteheads = git_get_heads_list(undef, @heads);
3325         foreach my $remote (keys %$remotes) {
3326                 $remotes->{$remote}{'heads'} = [ grep {
3327                         $_->{'name'} =~ s!^$remote/!!
3328                         } @remoteheads ];
3329         }
3330 }
3331
3332 sub git_get_references {
3333         my $type = shift || "";
3334         my %refs;
3335         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3336         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3337         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3338                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3339                 or return;
3340
3341         while (my $line = <$fd>) {
3342                 chomp $line;
3343                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3344                         if (defined $refs{$1}) {
3345                                 push @{$refs{$1}}, $2;
3346                         } else {
3347                                 $refs{$1} = [ $2 ];
3348                         }
3349                 }
3350         }
3351         close $fd or return;
3352         return \%refs;
3353 }
3354
3355 sub git_get_rev_name_tags {
3356         my $hash = shift || return undef;
3357
3358         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3359                 or return;
3360         my $name_rev = <$fd>;
3361         close $fd;
3362
3363         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3364                 return $1;
3365         } else {
3366                 # catches also '$hash undefined' output
3367                 return undef;
3368         }
3369 }
3370
3371 ## ----------------------------------------------------------------------
3372 ## parse to hash functions
3373
3374 sub parse_date {
3375         my $epoch = shift;
3376         my $tz = shift || "-0000";
3377
3378         my %date;
3379         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3380         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3381         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3382         $date{'hour'} = $hour;
3383         $date{'minute'} = $min;
3384         $date{'mday'} = $mday;
3385         $date{'day'} = $days[$wday];
3386         $date{'month'} = $months[$mon];
3387         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3388                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3389         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3390                              $mday, $months[$mon], $hour ,$min;
3391         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3392                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3393
3394         my ($tz_sign, $tz_hour, $tz_min) =
3395                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3396         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3397         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3398         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3399         $date{'hour_local'} = $hour;
3400         $date{'minute_local'} = $min;
3401         $date{'tz_local'} = $tz;
3402         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3403                                   1900+$year, $mon+1, $mday,
3404                                   $hour, $min, $sec, $tz);
3405         return %date;
3406 }
3407
3408 sub parse_tag {
3409         my $tag_id = shift;
3410         my %tag;
3411         my @comment;
3412
3413         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3414         $tag{'id'} = $tag_id;
3415         while (my $line = <$fd>) {
3416                 chomp $line;
3417                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3418                         $tag{'object'} = $1;
3419                 } elsif ($line =~ m/^type (.+)$/) {
3420                         $tag{'type'} = $1;
3421                 } elsif ($line =~ m/^tag (.+)$/) {
3422                         $tag{'name'} = $1;
3423                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3424                         $tag{'author'} = $1;
3425                         $tag{'author_epoch'} = $2;
3426                         $tag{'author_tz'} = $3;
3427                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3428                                 $tag{'author_name'}  = $1;
3429                                 $tag{'author_email'} = $2;
3430                         } else {
3431                                 $tag{'author_name'} = $tag{'author'};
3432                         }
3433                 } elsif ($line =~ m/--BEGIN/) {
3434                         push @comment, $line;
3435                         last;
3436                 } elsif ($line eq "") {
3437                         last;
3438                 }
3439         }
3440         push @comment, <$fd>;
3441         $tag{'comment'} = \@comment;
3442         close $fd or return;
3443         if (!defined $tag{'name'}) {
3444                 return
3445         };
3446         return %tag
3447 }
3448
3449 sub parse_commit_text {
3450         my ($commit_text, $withparents) = @_;
3451         my @commit_lines = split '\n', $commit_text;
3452         my %co;
3453
3454         pop @commit_lines; # Remove '\0'
3455
3456         if (! @commit_lines) {
3457                 return;
3458         }
3459
3460         my $header = shift @commit_lines;
3461         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3462                 return;
3463         }
3464         ($co{'id'}, my @parents) = split ' ', $header;
3465         while (my $line = shift @commit_lines) {
3466                 last if $line eq "\n";
3467                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3468                         $co{'tree'} = $1;
3469                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3470                         push @parents, $1;
3471                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3472                         $co{'author'} = to_utf8($1);
3473                         $co{'author_epoch'} = $2;
3474                         $co{'author_tz'} = $3;
3475                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3476                                 $co{'author_name'}  = $1;
3477                                 $co{'author_email'} = $2;
3478                         } else {
3479                                 $co{'author_name'} = $co{'author'};
3480                         }
3481                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3482                         $co{'committer'} = to_utf8($1);
3483                         $co{'committer_epoch'} = $2;
3484                         $co{'committer_tz'} = $3;
3485                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3486                                 $co{'committer_name'}  = $1;
3487                                 $co{'committer_email'} = $2;
3488                         } else {
3489                                 $co{'committer_name'} = $co{'committer'};
3490                         }
3491                 }
3492         }
3493         if (!defined $co{'tree'}) {
3494                 return;
3495         };
3496         $co{'parents'} = \@parents;
3497         $co{'parent'} = $parents[0];
3498
3499         foreach my $title (@commit_lines) {
3500                 $title =~ s/^    //;
3501                 if ($title ne "") {
3502                         $co{'title'} = chop_str($title, 80, 5);
3503                         # remove leading stuff of merges to make the interesting part visible
3504                         if (length($title) > 50) {
3505                                 $title =~ s/^Automatic //;
3506                                 $title =~ s/^merge (of|with) /Merge ... /i;
3507                                 if (length($title) > 50) {
3508                                         $title =~ s/(http|rsync):\/\///;
3509                                 }
3510                                 if (length($title) > 50) {
3511                                         $title =~ s/(master|www|rsync)\.//;
3512                                 }
3513                                 if (length($title) > 50) {
3514                                         $title =~ s/kernel.org:?//;
3515                                 }
3516                                 if (length($title) > 50) {
3517                                         $title =~ s/\/pub\/scm//;
3518                                 }
3519                         }
3520                         $co{'title_short'} = chop_str($title, 50, 5);
3521                         last;
3522                 }
3523         }
3524         if (! defined $co{'title'} || $co{'title'} eq "") {
3525                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3526         }
3527         # remove added spaces
3528         foreach my $line (@commit_lines) {
3529                 $line =~ s/^    //;
3530         }
3531         $co{'comment'} = \@commit_lines;
3532
3533         my $age = time - $co{'committer_epoch'};
3534         $co{'age'} = $age;
3535         $co{'age_string'} = age_string($age);
3536         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3537         if ($age > 60*60*24*7*2) {
3538                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3539                 $co{'age_string_age'} = $co{'age_string'};
3540         } else {
3541                 $co{'age_string_date'} = $co{'age_string'};
3542                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3543         }
3544         return %co;
3545 }
3546
3547 sub parse_commit {
3548         my ($commit_id) = @_;
3549         my %co;
3550
3551         local $/ = "\0";
3552
3553         open my $fd, "-|", git_cmd(), "rev-list",
3554                 "--parents",
3555                 "--header",
3556                 "--max-count=1",
3557                 $commit_id,
3558                 "--",
3559                 or die_error(500, "Open git-rev-list failed");
3560         %co = parse_commit_text(<$fd>, 1);
3561         close $fd;
3562
3563         return %co;
3564 }
3565
3566 sub parse_commits {
3567         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3568         my @cos;
3569
3570         $maxcount ||= 1;
3571         $skip ||= 0;
3572
3573         local $/ = "\0";
3574
3575         open my $fd, "-|", git_cmd(), "rev-list",
3576                 "--header",
3577                 @args,
3578                 ("--max-count=" . $maxcount),
3579                 ("--skip=" . $skip),
3580                 @extra_options,
3581                 $commit_id,
3582                 "--",
3583                 ($filename ? ($filename) : ())
3584                 or die_error(500, "Open git-rev-list failed");
3585         while (my $line = <$fd>) {
3586                 my %co = parse_commit_text($line);
3587                 push @cos, \%co;
3588         }
3589         close $fd;
3590
3591         return wantarray ? @cos : \@cos;
3592 }
3593
3594 # parse line of git-diff-tree "raw" output
3595 sub parse_difftree_raw_line {
3596         my $line = shift;
3597         my %res;
3598
3599         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3600         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3601         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3602                 $res{'from_mode'} = $1;
3603                 $res{'to_mode'} = $2;
3604                 $res{'from_id'} = $3;
3605                 $res{'to_id'} = $4;
3606                 $res{'status'} = $5;
3607                 $res{'similarity'} = $6;
3608                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3609                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3610                 } else {
3611                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3612                 }
3613         }
3614         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3615         # combined diff (for merge commit)
3616         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3617                 $res{'nparents'}  = length($1);
3618                 $res{'from_mode'} = [ split(' ', $2) ];
3619                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3620                 $res{'from_id'} = [ split(' ', $3) ];
3621                 $res{'to_id'} = pop @{$res{'from_id'}};
3622                 $res{'status'} = [ split('', $4) ];
3623                 $res{'to_file'} = unquote($5);
3624         }
3625         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3626         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3627                 $res{'commit'} = $1;
3628         }
3629
3630         return wantarray ? %res : \%res;
3631 }
3632
3633 # wrapper: return parsed line of git-diff-tree "raw" output
3634 # (the argument might be raw line, or parsed info)
3635 sub parsed_difftree_line {
3636         my $line_or_ref = shift;
3637
3638         if (ref($line_or_ref) eq "HASH") {
3639                 # pre-parsed (or generated by hand)
3640                 return $line_or_ref;
3641         } else {
3642                 return parse_difftree_raw_line($line_or_ref);
3643         }
3644 }
3645
3646 # parse line of git-ls-tree output
3647 sub parse_ls_tree_line {
3648         my $line = shift;
3649         my %opts = @_;
3650         my %res;
3651
3652         if ($opts{'-l'}) {
3653                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3654                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3655
3656                 $res{'mode'} = $1;
3657                 $res{'type'} = $2;
3658                 $res{'hash'} = $3;
3659                 $res{'size'} = $4;
3660                 if ($opts{'-z'}) {
3661                         $res{'name'} = $5;
3662                 } else {
3663                         $res{'name'} = unquote($5);
3664                 }
3665         } else {
3666                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3667                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3668
3669                 $res{'mode'} = $1;
3670                 $res{'type'} = $2;
3671                 $res{'hash'} = $3;
3672                 if ($opts{'-z'}) {
3673                         $res{'name'} = $4;
3674                 } else {
3675                         $res{'name'} = unquote($4);
3676                 }
3677         }
3678
3679         return wantarray ? %res : \%res;
3680 }
3681
3682 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3683 sub parse_from_to_diffinfo {
3684         my ($diffinfo, $from, $to, @parents) = @_;
3685
3686         if ($diffinfo->{'nparents'}) {
3687                 # combined diff
3688                 $from->{'file'} = [];
3689                 $from->{'href'} = [];
3690                 fill_from_file_info($diffinfo, @parents)
3691                         unless exists $diffinfo->{'from_file'};
3692                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3693                         $from->{'file'}[$i] =
3694                                 defined $diffinfo->{'from_file'}[$i] ?
3695                                         $diffinfo->{'from_file'}[$i] :
3696                                         $diffinfo->{'to_file'};
3697                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3698                                 $from->{'href'}[$i] = href(action=>"blob",
3699                                                            hash_base=>$parents[$i],
3700                                                            hash=>$diffinfo->{'from_id'}[$i],
3701                                                            file_name=>$from->{'file'}[$i]);
3702                         } else {
3703                                 $from->{'href'}[$i] = undef;
3704                         }
3705                 }
3706         } else {
3707                 # ordinary (not combined) diff
3708                 $from->{'file'} = $diffinfo->{'from_file'};
3709                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3710                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3711                                                hash=>$diffinfo->{'from_id'},
3712                                                file_name=>$from->{'file'});
3713                 } else {
3714                         delete $from->{'href'};
3715                 }
3716         }
3717
3718         $to->{'file'} = $diffinfo->{'to_file'};
3719         if (!is_deleted($diffinfo)) { # file exists in result
3720                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3721                                      hash=>$diffinfo->{'to_id'},
3722                                      file_name=>$to->{'file'});
3723         } else {
3724                 delete $to->{'href'};
3725         }
3726 }
3727
3728 ## ......................................................................
3729 ## parse to array of hashes functions
3730
3731 sub git_get_heads_list {
3732         my ($limit, @classes) = @_;
3733         @classes = get_branch_refs() unless @classes;
3734         my @patterns = map { "refs/$_" } @classes;
3735         my @headslist;
3736
3737         open my $fd, '-|', git_cmd(), 'for-each-ref',
3738                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3739                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3740                 @patterns
3741                 or return;
3742         while (my $line = <$fd>) {
3743                 my %ref_item;
3744
3745                 chomp $line;
3746                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3747                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3748                 my ($committer, $epoch, $tz) =
3749                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3750                 $ref_item{'fullname'}  = $name;
3751                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3752                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3753                 $ref_item{'name'} = $name;
3754                 # for refs neither in 'heads' nor 'remotes' we want to
3755                 # show their ref dir
3756                 my $ref_dir = (defined $1) ? $1 : '';
3757                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3758                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3759                 }
3760
3761                 $ref_item{'id'}    = $hash;
3762                 $ref_item{'title'} = $title || '(no commit message)';
3763                 $ref_item{'epoch'} = $epoch;
3764                 if ($epoch) {
3765                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3766                 } else {
3767                         $ref_item{'age'} = "unknown";
3768                 }
3769
3770                 push @headslist, \%ref_item;
3771         }
3772         close $fd;
3773
3774         return wantarray ? @headslist : \@headslist;
3775 }
3776
3777 sub git_get_tags_list {
3778         my $limit = shift;
3779         my @tagslist;
3780
3781         open my $fd, '-|', git_cmd(), 'for-each-ref',
3782                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3783                 '--format=%(objectname) %(objecttype) %(refname) '.
3784                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3785                 'refs/tags'
3786                 or return;
3787         while (my $line = <$fd>) {
3788                 my %ref_item;
3789
3790                 chomp $line;
3791                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3792                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3793                 my ($creator, $epoch, $tz) =
3794                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3795                 $ref_item{'fullname'} = $name;
3796                 $name =~ s!^refs/tags/!!;
3797
3798                 $ref_item{'type'} = $type;
3799                 $ref_item{'id'} = $id;
3800                 $ref_item{'name'} = $name;
3801                 if ($type eq "tag") {
3802                         $ref_item{'subject'} = $title;
3803                         $ref_item{'reftype'} = $reftype;
3804                         $ref_item{'refid'}   = $refid;
3805                 } else {
3806                         $ref_item{'reftype'} = $type;
3807                         $ref_item{'refid'}   = $id;
3808                 }
3809
3810                 if ($type eq "tag" || $type eq "commit") {
3811                         $ref_item{'epoch'} = $epoch;
3812                         if ($epoch) {
3813                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3814                         } else {
3815                                 $ref_item{'age'} = "unknown";
3816                         }
3817                 }
3818
3819                 push @tagslist, \%ref_item;
3820         }
3821         close $fd;
3822
3823         return wantarray ? @tagslist : \@tagslist;
3824 }
3825
3826 ## ----------------------------------------------------------------------
3827 ## filesystem-related functions
3828
3829 sub get_file_owner {
3830         my $path = shift;
3831
3832         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3833         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3834         if (!defined $gcos) {
3835                 return undef;
3836         }
3837         my $owner = $gcos;
3838         $owner =~ s/[,;].*$//;
3839         return to_utf8($owner);
3840 }
3841
3842 # assume that file exists
3843 sub insert_file {
3844         my $filename = shift;
3845
3846         open my $fd, '<', $filename;
3847         print map { to_utf8($_) } <$fd>;
3848         close $fd;
3849 }
3850
3851 ## ......................................................................
3852 ## mimetype related functions
3853
3854 sub mimetype_guess_file {
3855         my $filename = shift;
3856         my $mimemap = shift;
3857         -r $mimemap or return undef;
3858
3859         my %mimemap;
3860         open(my $mh, '<', $mimemap) or return undef;
3861         while (<$mh>) {
3862                 next if m/^#/; # skip comments
3863                 my ($mimetype, @exts) = split(/\s+/);
3864                 foreach my $ext (@exts) {
3865                         $mimemap{$ext} = $mimetype;
3866                 }
3867         }
3868         close($mh);
3869
3870         $filename =~ /\.([^.]*)$/;
3871         return $mimemap{$1};
3872 }
3873
3874 sub mimetype_guess {
3875         my $filename = shift;
3876         my $mime;
3877         $filename =~ /\./ or return undef;
3878
3879         if ($mimetypes_file) {
3880                 my $file = $mimetypes_file;
3881                 if ($file !~ m!^/!) { # if it is relative path
3882                         # it is relative to project
3883                         $file = "$projectroot/$project/$file";
3884                 }
3885                 $mime = mimetype_guess_file($filename, $file);
3886         }
3887         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3888         return $mime;
3889 }
3890
3891 sub blob_mimetype {
3892         my $fd = shift;
3893         my $filename = shift;
3894
3895         if ($filename) {
3896                 my $mime = mimetype_guess($filename);
3897                 $mime and return $mime;
3898         }
3899
3900         # just in case
3901         return $default_blob_plain_mimetype unless $fd;
3902
3903         if (-T $fd) {
3904                 return 'text/plain';
3905         } elsif (! $filename) {
3906                 return 'application/octet-stream';
3907         } elsif ($filename =~ m/\.png$/i) {
3908                 return 'image/png';
3909         } elsif ($filename =~ m/\.gif$/i) {
3910                 return 'image/gif';
3911         } elsif ($filename =~ m/\.jpe?g$/i) {
3912                 return 'image/jpeg';
3913         } else {
3914                 return 'application/octet-stream';
3915         }
3916 }
3917
3918 sub blob_contenttype {
3919         my ($fd, $file_name, $type) = @_;
3920
3921         $type ||= blob_mimetype($fd, $file_name);
3922         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3923                 $type .= "; charset=$default_text_plain_charset";
3924         }
3925
3926         return $type;
3927 }
3928
3929 # guess file syntax for syntax highlighting; return undef if no highlighting
3930 # the name of syntax can (in the future) depend on syntax highlighter used
3931 sub guess_file_syntax {
3932         my ($highlight, $mimetype, $file_name) = @_;
3933         return undef unless ($highlight && defined $file_name);
3934         my $basename = basename($file_name, '.in');
3935         return $highlight_basename{$basename}
3936                 if exists $highlight_basename{$basename};
3937
3938         $basename =~ /\.([^.]*)$/;
3939         my $ext = $1 or return undef;
3940         return $highlight_ext{$ext}
3941                 if exists $highlight_ext{$ext};
3942
3943         return undef;
3944 }
3945
3946 # run highlighter and return FD of its output,
3947 # or return original FD if no highlighting
3948 sub run_highlighter {
3949         my ($fd, $highlight, $syntax) = @_;
3950         return $fd unless ($highlight && defined $syntax);
3951
3952         close $fd;
3953         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3954                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
3955                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
3956                     '--', "-fe=$fallback_encoding")." | ".
3957                   quote_command($highlight_bin).
3958                   " --replace-tabs=8 --fragment --syntax $syntax |"
3959                 or die_error(500, "Couldn't open file or run syntax highlighter");
3960         return $fd;
3961 }
3962
3963 ## ======================================================================
3964 ## functions printing HTML: header, footer, error page
3965
3966 sub get_page_title {
3967         my $title = to_utf8($site_name);
3968
3969         unless (defined $project) {
3970                 if (defined $project_filter) {
3971                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3972                 }
3973                 return $title;
3974         }
3975         $title .= " - " . to_utf8($project);
3976
3977         return $title unless (defined $action);
3978         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3979
3980         return $title unless (defined $file_name);
3981         $title .= " - " . esc_path($file_name);
3982         if ($action eq "tree" && $file_name !~ m|/$|) {
3983                 $title .= "/";
3984         }
3985
3986         return $title;
3987 }
3988
3989 sub get_content_type_html {
3990         # require explicit support from the UA if we are to send the page as
3991         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3992         # we have to do this because MSIE sometimes globs '*/*', pretending to
3993         # support xhtml+xml but choking when it gets what it asked for.
3994         if (defined $cgi->http('HTTP_ACCEPT') &&
3995             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3996             $cgi->Accept('application/xhtml+xml') != 0) {
3997                 return 'application/xhtml+xml';
3998         } else {
3999                 return 'text/html';
4000         }
4001 }
4002
4003 sub print_feed_meta {
4004         if (defined $project) {
4005                 my %href_params = get_feed_info();
4006                 if (!exists $href_params{'-title'}) {
4007                         $href_params{'-title'} = 'log';
4008                 }
4009
4010                 foreach my $format (qw(RSS Atom)) {
4011                         my $type = lc($format);
4012                         my %link_attr = (
4013                                 '-rel' => 'alternate',
4014                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4015                                 '-type' => "application/$type+xml"
4016                         );
4017
4018                         $href_params{'extra_options'} = undef;
4019                         $href_params{'action'} = $type;
4020                         $link_attr{'-href'} = href(%href_params);
4021                         print "<link ".
4022                               "rel=\"$link_attr{'-rel'}\" ".
4023                               "title=\"$link_attr{'-title'}\" ".
4024                               "href=\"$link_attr{'-href'}\" ".
4025                               "type=\"$link_attr{'-type'}\" ".
4026                               "/>\n";
4027
4028                         $href_params{'extra_options'} = '--no-merges';
4029                         $link_attr{'-href'} = href(%href_params);
4030                         $link_attr{'-title'} .= ' (no merges)';
4031                         print "<link ".
4032                               "rel=\"$link_attr{'-rel'}\" ".
4033                               "title=\"$link_attr{'-title'}\" ".
4034                               "href=\"$link_attr{'-href'}\" ".
4035                               "type=\"$link_attr{'-type'}\" ".
4036                               "/>\n";
4037                 }
4038
4039         } else {
4040                 printf('<link rel="alternate" title="%s projects list" '.
4041                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4042                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4043                 printf('<link rel="alternate" title="%s projects feeds" '.
4044                        'href="%s" type="text/x-opml" />'."\n",
4045                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4046         }
4047 }
4048
4049 sub print_header_links {
4050         my $status = shift;
4051
4052         # print out each stylesheet that exist, providing backwards capability
4053         # for those people who defined $stylesheet in a config file
4054         if (defined $stylesheet) {
4055                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4056         } else {
4057                 foreach my $stylesheet (@stylesheets) {
4058                         next unless $stylesheet;
4059                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4060                 }
4061         }
4062         print_feed_meta()
4063                 if ($status eq '200 OK');
4064         if (defined $favicon) {
4065                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4066         }
4067 }
4068
4069 sub print_nav_breadcrumbs_path {
4070         my $dirprefix = undef;
4071         while (my $part = shift) {
4072                 $dirprefix .= "/" if defined $dirprefix;
4073                 $dirprefix .= $part;
4074                 print $cgi->a({-href => href(project => undef,
4075                                              project_filter => $dirprefix,
4076                                              action => "project_list")},
4077                               esc_html($part)) . " / ";
4078         }
4079 }
4080
4081 sub print_nav_breadcrumbs {
4082         my %opts = @_;
4083
4084         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4085                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4086         }
4087         if (defined $project) {
4088                 my @dirname = split '/', $project;
4089                 my $projectbasename = pop @dirname;
4090                 print_nav_breadcrumbs_path(@dirname);
4091                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4092                 if (defined $action) {
4093                         my $action_print = $action ;
4094                         if (defined $opts{-action_extra}) {
4095                                 $action_print = $cgi->a({-href => href(action=>$action)},
4096                                         $action);
4097                         }
4098                         print " / $action_print";
4099                 }
4100                 if (defined $opts{-action_extra}) {
4101                         print " / $opts{-action_extra}";
4102                 }
4103                 print "\n";
4104         } elsif (defined $project_filter) {
4105                 print_nav_breadcrumbs_path(split '/', $project_filter);
4106         }
4107 }
4108
4109 sub print_search_form {
4110         if (!defined $searchtext) {
4111                 $searchtext = "";
4112         }
4113         my $search_hash;
4114         if (defined $hash_base) {
4115                 $search_hash = $hash_base;
4116         } elsif (defined $hash) {
4117                 $search_hash = $hash;
4118         } else {
4119                 $search_hash = "HEAD";
4120         }
4121         my $action = $my_uri;
4122         my $use_pathinfo = gitweb_check_feature('pathinfo');
4123         if ($use_pathinfo) {
4124                 $action .= "/".esc_url($project);
4125         }
4126         print $cgi->start_form(-method => "get", -action => $action) .
4127               "<div class=\"search\">\n" .
4128               (!$use_pathinfo &&
4129               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4130               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4131               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4132               $cgi->popup_menu(-name => 'st', -default => 'commit',
4133                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4134               " " . $cgi->a({-href => href(action=>"search_help"),
4135                              -title => "search help" }, "?") . " search:\n",
4136               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4137               "<span title=\"Extended regular expression\">" .
4138               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4139                              -checked => $search_use_regexp) .
4140               "</span>" .
4141               "</div>" .
4142               $cgi->end_form() . "\n";
4143 }
4144
4145 sub git_header_html {
4146         my $status = shift || "200 OK";
4147         my $expires = shift;
4148         my %opts = @_;
4149
4150         my $title = get_page_title();
4151         my $content_type = get_content_type_html();
4152         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4153                            -status=> $status, -expires => $expires)
4154                 unless ($opts{'-no_http_header'});
4155         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4156         print <<EOF;
4157 <?xml version="1.0" encoding="utf-8"?>
4158 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4159 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4160 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4161 <!-- git core binaries version $git_version -->
4162 <head>
4163 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4164 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4165 <meta name="robots" content="index, nofollow"/>
4166 <title>$title</title>
4167 <script type="text/javascript">/* <![CDATA[ */
4168 function fixBlameLinks() {
4169         var allLinks = document.getElementsByTagName("a");
4170         for (var i = 0; i < allLinks.length; i++) {
4171                 var link = allLinks.item(i);
4172                 if (link.className == 'blamelink')
4173                         link.href = link.href.replace("/blame/", "/blame_incremental/");
4174         }
4175 }
4176 /* ]]> */</script>
4177 EOF
4178         # the stylesheet, favicon etc urls won't work correctly with path_info
4179         # unless we set the appropriate base URL
4180         if ($ENV{'PATH_INFO'}) {
4181                 print "<base href=\"".esc_url($base_url)."\" />\n";
4182         }
4183         print_header_links($status);
4184
4185         if (defined $site_html_head_string) {
4186                 print to_utf8($site_html_head_string);
4187         }
4188
4189         print "</head>\n" .
4190               "<body>\n";
4191
4192         if (defined $site_header && -f $site_header) {
4193                 insert_file($site_header);
4194         }
4195
4196         print "<div class=\"page_header\">\n";
4197         if (defined $logo) {
4198                 print $cgi->a({-href => esc_url($logo_url),
4199                                -title => $logo_label},
4200                               $cgi->img({-src => esc_url($logo),
4201                                          -width => 72, -height => 27,
4202                                          -alt => "git",
4203                                          -class => "logo"}));
4204         }
4205         print_nav_breadcrumbs(%opts);
4206         print "</div>\n";
4207
4208         my $have_search = gitweb_check_feature('search');
4209         if (defined $project && $have_search) {
4210                 print_search_form();
4211         }
4212 }
4213
4214 sub git_footer_html {
4215         my $feed_class = 'rss_logo';
4216
4217         print "<div class=\"page_footer\">\n";
4218         if (defined $project) {
4219                 my $descr = git_get_project_description($project);
4220                 if (defined $descr) {
4221                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4222                 }
4223
4224                 my %href_params = get_feed_info();
4225                 if (!%href_params) {
4226                         $feed_class .= ' generic';
4227                 }
4228                 $href_params{'-title'} ||= 'log';
4229
4230                 foreach my $format (qw(RSS Atom)) {
4231                         $href_params{'action'} = lc($format);
4232                         print $cgi->a({-href => href(%href_params),
4233                                       -title => "$href_params{'-title'} $format feed",
4234                                       -class => $feed_class}, $format)."\n";
4235                 }
4236
4237         } else {
4238                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4239                                              project_filter => $project_filter),
4240                               -class => $feed_class}, "OPML") . " ";
4241                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4242                                              project_filter => $project_filter),
4243                               -class => $feed_class}, "TXT") . "\n";
4244         }
4245         print "</div>\n"; # class="page_footer"
4246
4247         if (defined $t0 && gitweb_check_feature('timed')) {
4248                 print "<div id=\"generating_info\">\n";
4249                 print 'This page took '.
4250                       '<span id="generating_time" class="time_span">'.
4251                       tv_interval($t0, [ gettimeofday() ]).
4252                       ' seconds </span>'.
4253                       ' and '.
4254                       '<span id="generating_cmd">'.
4255                       $number_of_git_cmds.
4256                       '</span> git commands '.
4257                       " to generate.\n";
4258                 print "</div>\n"; # class="page_footer"
4259         }
4260
4261         if (defined $site_footer && -f $site_footer) {
4262                 insert_file($site_footer);
4263         }
4264
4265         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4266         if (defined $action &&
4267             $action eq 'blame_incremental') {
4268                 print qq!<script type="text/javascript">\n!.
4269                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4270                       qq!           "!. href() .qq!");\n!.
4271                       qq!</script>\n!;
4272         } else {
4273                 my ($jstimezone, $tz_cookie, $datetime_class) =
4274                         gitweb_get_feature('javascript-timezone');
4275
4276                 print qq!<script type="text/javascript">\n!.
4277                       qq!window.onload = function () {\n!;
4278                 if (gitweb_check_feature('blame_incremental')) {
4279                         print qq!       fixBlameLinks();\n!;
4280                 }
4281                 if (gitweb_check_feature('javascript-actions')) {
4282                         print qq!       fixLinks();\n!;
4283                 }
4284                 if ($jstimezone && $tz_cookie && $datetime_class) {
4285                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4286                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4287                 }
4288                 print qq!};\n!.
4289                       qq!</script>\n!;
4290         }
4291
4292         print "</body>\n" .
4293               "</html>";
4294 }
4295
4296 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4297 # Example: die_error(404, 'Hash not found')
4298 # By convention, use the following status codes (as defined in RFC 2616):
4299 # 400: Invalid or missing CGI parameters, or
4300 #      requested object exists but has wrong type.
4301 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4302 #      this server or project.
4303 # 404: Requested object/revision/project doesn't exist.
4304 # 500: The server isn't configured properly, or
4305 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4306 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4307 # 503: The server is currently unavailable (because it is overloaded,
4308 #      or down for maintenance).  Generally, this is a temporary state.
4309 sub die_error {
4310         my $status = shift || 500;
4311         my $error = esc_html(shift) || "Internal Server Error";
4312         my $extra = shift;
4313         my %opts = @_;
4314
4315         my %http_responses = (
4316                 400 => '400 Bad Request',
4317                 403 => '403 Forbidden',
4318                 404 => '404 Not Found',
4319                 500 => '500 Internal Server Error',
4320                 503 => '503 Service Unavailable',
4321         );
4322         git_header_html($http_responses{$status}, undef, %opts);
4323         print <<EOF;
4324 <div class="page_body">
4325 <br /><br />
4326 $status - $error
4327 <br />
4328 EOF
4329         if (defined $extra) {
4330                 print "<hr />\n" .
4331                       "$extra\n";
4332         }
4333         print "</div>\n";
4334
4335         git_footer_html();
4336         goto DONE_GITWEB
4337                 unless ($opts{'-error_handler'});
4338 }
4339
4340 ## ----------------------------------------------------------------------
4341 ## functions printing or outputting HTML: navigation
4342
4343 sub git_print_page_nav {
4344         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4345         $extra = '' if !defined $extra; # pager or formats
4346
4347         my @navs = qw(summary shortlog log commit commitdiff tree);
4348         if ($suppress) {
4349                 @navs = grep { $_ ne $suppress } @navs;
4350         }
4351
4352         my %arg = map { $_ => {action=>$_} } @navs;
4353         if (defined $head) {
4354                 for (qw(commit commitdiff)) {
4355                         $arg{$_}{'hash'} = $head;
4356                 }
4357                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4358                         for (qw(shortlog log)) {
4359                                 $arg{$_}{'hash'} = $head;
4360                         }
4361                 }
4362         }
4363
4364         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4365         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4366
4367         my @actions = gitweb_get_feature('actions');
4368         my %repl = (
4369                 '%' => '%',
4370                 'n' => $project,         # project name
4371                 'f' => $git_dir,         # project path within filesystem
4372                 'h' => $treehead || '',  # current hash ('h' parameter)
4373                 'b' => $treebase || '',  # hash base ('hb' parameter)
4374         );
4375         while (@actions) {
4376                 my ($label, $link, $pos) = splice(@actions,0,3);
4377                 # insert
4378                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4379                 # munch munch
4380                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4381                 $arg{$label}{'_href'} = $link;
4382         }
4383
4384         print "<div class=\"page_nav\">\n" .
4385                 (join " | ",
4386                  map { $_ eq $current ?
4387                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4388                  } @navs);
4389         print "<br/>\n$extra<br/>\n" .
4390               "</div>\n";
4391 }
4392
4393 # returns a submenu for the nagivation of the refs views (tags, heads,
4394 # remotes) with the current view disabled and the remotes view only
4395 # available if the feature is enabled
4396 sub format_ref_views {
4397         my ($current) = @_;
4398         my @ref_views = qw{tags heads};
4399         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4400         return join " | ", map {
4401                 $_ eq $current ? $_ :
4402                 $cgi->a({-href => href(action=>$_)}, $_)
4403         } @ref_views
4404 }
4405
4406 sub format_paging_nav {
4407         my ($action, $page, $has_next_link) = @_;
4408         my $paging_nav;
4409
4410
4411         if ($page > 0) {
4412                 $paging_nav .=
4413                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4414                         " &sdot; " .
4415                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4416                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4417         } else {
4418                 $paging_nav .= "first &sdot; prev";
4419         }
4420
4421         if ($has_next_link) {
4422                 $paging_nav .= " &sdot; " .
4423                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4424                                  -accesskey => "n", -title => "Alt-n"}, "next");
4425         } else {
4426                 $paging_nav .= " &sdot; next";
4427         }
4428
4429         return $paging_nav;
4430 }
4431
4432 ## ......................................................................
4433 ## functions printing or outputting HTML: div
4434
4435 sub git_print_header_div {
4436         my ($action, $title, $hash, $hash_base) = @_;
4437         my %args = ();
4438
4439         $args{'action'} = $action;
4440         $args{'hash'} = $hash if $hash;
4441         $args{'hash_base'} = $hash_base if $hash_base;
4442
4443         print "<div class=\"header\">\n" .
4444               $cgi->a({-href => href(%args), -class => "title"},
4445               $title ? $title : $action) .
4446               "\n</div>\n";
4447 }
4448
4449 sub format_repo_url {
4450         my ($name, $url) = @_;
4451         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4452 }
4453
4454 # Group output by placing it in a DIV element and adding a header.
4455 # Options for start_div() can be provided by passing a hash reference as the
4456 # first parameter to the function.
4457 # Options to git_print_header_div() can be provided by passing an array
4458 # reference. This must follow the options to start_div if they are present.
4459 # The content can be a scalar, which is output as-is, a scalar reference, which
4460 # is output after html escaping, an IO handle passed either as *handle or
4461 # *handle{IO}, or a function reference. In the latter case all following
4462 # parameters will be taken as argument to the content function call.
4463 sub git_print_section {
4464         my ($div_args, $header_args, $content);
4465         my $arg = shift;
4466         if (ref($arg) eq 'HASH') {
4467                 $div_args = $arg;
4468                 $arg = shift;
4469         }
4470         if (ref($arg) eq 'ARRAY') {
4471                 $header_args = $arg;
4472                 $arg = shift;
4473         }
4474         $content = $arg;
4475
4476         print $cgi->start_div($div_args);
4477         git_print_header_div(@$header_args);
4478
4479         if (ref($content) eq 'CODE') {
4480                 $content->(@_);
4481         } elsif (ref($content) eq 'SCALAR') {
4482                 print esc_html($$content);
4483         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4484                 print <$content>;
4485         } elsif (!ref($content) && defined($content)) {
4486                 print $content;
4487         }
4488
4489         print $cgi->end_div;
4490 }
4491
4492 sub format_timestamp_html {
4493         my $date = shift;
4494         my $strtime = $date->{'rfc2822'};
4495
4496         my (undef, undef, $datetime_class) =
4497                 gitweb_get_feature('javascript-timezone');
4498         if ($datetime_class) {
4499                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4500         }
4501
4502         my $localtime_format = '(%02d:%02d %s)';
4503         if ($date->{'hour_local'} < 6) {
4504                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4505         }
4506         $strtime .= ' ' .
4507                     sprintf($localtime_format,
4508                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4509
4510         return $strtime;
4511 }
4512
4513 # Outputs the author name and date in long form
4514 sub git_print_authorship {
4515         my $co = shift;
4516         my %opts = @_;
4517         my $tag = $opts{-tag} || 'div';
4518         my $author = $co->{'author_name'};
4519
4520         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4521         print "<$tag class=\"author_date\">" .
4522               format_search_author($author, "author", esc_html($author)) .
4523               " [".format_timestamp_html(\%ad)."]".
4524               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4525               "</$tag>\n";
4526 }
4527
4528 # Outputs table rows containing the full author or committer information,
4529 # in the format expected for 'commit' view (& similar).
4530 # Parameters are a commit hash reference, followed by the list of people
4531 # to output information for. If the list is empty it defaults to both
4532 # author and committer.
4533 sub git_print_authorship_rows {
4534         my $co = shift;
4535         # too bad we can't use @people = @_ || ('author', 'committer')
4536         my @people = @_;
4537         @people = ('author', 'committer') unless @people;
4538         foreach my $who (@people) {
4539                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4540                 print "<tr><td>$who</td><td>" .
4541                       format_search_author($co->{"${who}_name"}, $who,
4542                                            esc_html($co->{"${who}_name"})) . " " .
4543                       format_search_author($co->{"${who}_email"}, $who,
4544                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4545                       "</td><td rowspan=\"2\">" .
4546                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4547                       "</td></tr>\n" .
4548                       "<tr>" .
4549                       "<td></td><td>" .
4550                       format_timestamp_html(\%wd) .
4551                       "</td>" .
4552                       "</tr>\n";
4553         }
4554 }
4555
4556 sub git_print_page_path {
4557         my $name = shift;
4558         my $type = shift;
4559         my $hb = shift;
4560
4561
4562         print "<div class=\"page_path\">";
4563         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4564                       -title => 'tree root'}, to_utf8("[$project]"));
4565         print " / ";
4566         if (defined $name) {
4567                 my @dirname = split '/', $name;
4568                 my $basename = pop @dirname;
4569                 my $fullname = '';
4570
4571                 foreach my $dir (@dirname) {
4572                         $fullname .= ($fullname ? '/' : '') . $dir;
4573                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4574                                                      hash_base=>$hb),
4575                                       -title => $fullname}, esc_path($dir));
4576                         print " / ";
4577                 }
4578                 if (defined $type && $type eq 'blob') {
4579                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4580                                                      hash_base=>$hb),
4581                                       -title => $name}, esc_path($basename));
4582                 } elsif (defined $type && $type eq 'tree') {
4583                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4584                                                      hash_base=>$hb),
4585                                       -title => $name}, esc_path($basename));
4586                         print " / ";
4587                 } else {
4588                         print esc_path($basename);
4589                 }
4590         }
4591         print "<br/></div>\n";
4592 }
4593
4594 sub git_print_log {
4595         my $log = shift;
4596         my %opts = @_;
4597
4598         if ($opts{'-remove_title'}) {
4599                 # remove title, i.e. first line of log
4600                 shift @$log;
4601         }
4602         # remove leading empty lines
4603         while (defined $log->[0] && $log->[0] eq "") {
4604                 shift @$log;
4605         }
4606
4607         # print log
4608         my $skip_blank_line = 0;
4609         foreach my $line (@$log) {
4610                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4611                         if (! $opts{'-remove_signoff'}) {
4612                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4613                                 $skip_blank_line = 1;
4614                         }
4615                         next;
4616                 }
4617
4618                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4619                         if (! $opts{'-remove_signoff'}) {
4620                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4621                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4622                                         "</span><br/>\n";
4623                                 $skip_blank_line = 1;
4624                         }
4625                         next;
4626                 }
4627
4628                 # print only one empty line
4629                 # do not print empty line after signoff
4630                 if ($line eq "") {
4631                         next if ($skip_blank_line);
4632                         $skip_blank_line = 1;
4633                 } else {
4634                         $skip_blank_line = 0;
4635                 }
4636
4637                 print format_log_line_html($line) . "<br/>\n";
4638         }
4639
4640         if ($opts{'-final_empty_line'}) {
4641                 # end with single empty line
4642                 print "<br/>\n" unless $skip_blank_line;
4643         }
4644 }
4645
4646 # return link target (what link points to)
4647 sub git_get_link_target {
4648         my $hash = shift;
4649         my $link_target;
4650
4651         # read link
4652         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4653                 or return;
4654         {
4655                 local $/ = undef;
4656                 $link_target = <$fd>;
4657         }
4658         close $fd
4659                 or return;
4660
4661         return $link_target;
4662 }
4663
4664 # given link target, and the directory (basedir) the link is in,
4665 # return target of link relative to top directory (top tree);
4666 # return undef if it is not possible (including absolute links).
4667 sub normalize_link_target {
4668         my ($link_target, $basedir) = @_;
4669
4670         # absolute symlinks (beginning with '/') cannot be normalized
4671         return if (substr($link_target, 0, 1) eq '/');
4672
4673         # normalize link target to path from top (root) tree (dir)
4674         my $path;
4675         if ($basedir) {
4676                 $path = $basedir . '/' . $link_target;
4677         } else {
4678                 # we are in top (root) tree (dir)
4679                 $path = $link_target;
4680         }
4681
4682         # remove //, /./, and /../
4683         my @path_parts;
4684         foreach my $part (split('/', $path)) {
4685                 # discard '.' and ''
4686                 next if (!$part || $part eq '.');
4687                 # handle '..'
4688                 if ($part eq '..') {
4689                         if (@path_parts) {
4690                                 pop @path_parts;
4691                         } else {
4692                                 # link leads outside repository (outside top dir)
4693                                 return;
4694                         }
4695                 } else {
4696                         push @path_parts, $part;
4697                 }
4698         }
4699         $path = join('/', @path_parts);
4700
4701         return $path;
4702 }
4703
4704 # print tree entry (row of git_tree), but without encompassing <tr> element
4705 sub git_print_tree_entry {
4706         my ($t, $basedir, $hash_base, $have_blame) = @_;
4707
4708         my %base_key = ();
4709         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4710
4711         # The format of a table row is: mode list link.  Where mode is
4712         # the mode of the entry, list is the name of the entry, an href,
4713         # and link is the action links of the entry.
4714
4715         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4716         if (exists $t->{'size'}) {
4717                 print "<td class=\"size\">$t->{'size'}</td>\n";
4718         }
4719         if ($t->{'type'} eq "blob") {
4720                 print "<td class=\"list\">" .
4721                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4722                                                file_name=>"$basedir$t->{'name'}", %base_key),
4723                                 -class => "list"}, esc_path($t->{'name'}));
4724                 if (S_ISLNK(oct $t->{'mode'})) {
4725                         my $link_target = git_get_link_target($t->{'hash'});
4726                         if ($link_target) {
4727                                 my $norm_target = normalize_link_target($link_target, $basedir);
4728                                 if (defined $norm_target) {
4729                                         print " -> " .
4730                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4731                                                                      file_name=>$norm_target),
4732                                                        -title => $norm_target}, esc_path($link_target));
4733                                 } else {
4734                                         print " -> " . esc_path($link_target);
4735                                 }
4736                         }
4737                 }
4738                 print "</td>\n";
4739                 print "<td class=\"link\">";
4740                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4741                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4742                               "blob");
4743                 if ($have_blame) {
4744                         print " | " .
4745                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4746                                                      file_name=>"$basedir$t->{'name'}", %base_key),
4747                                       -class => "blamelink"},
4748                                       "blame");
4749                 }
4750                 if (defined $hash_base) {
4751                         print " | " .
4752                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4753                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4754                                       "history");
4755                 }
4756                 print " | " .
4757                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4758                                                file_name=>"$basedir$t->{'name'}")},
4759                                 "raw");
4760                 print "</td>\n";
4761
4762         } elsif ($t->{'type'} eq "tree") {
4763                 print "<td class=\"list\">";
4764                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4765                                              file_name=>"$basedir$t->{'name'}",
4766                                              %base_key)},
4767                               esc_path($t->{'name'}));
4768                 print "</td>\n";
4769                 print "<td class=\"link\">";
4770                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4771                                              file_name=>"$basedir$t->{'name'}",
4772                                              %base_key)},
4773                               "tree");
4774                 if (defined $hash_base) {
4775                         print " | " .
4776                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4777                                                      file_name=>"$basedir$t->{'name'}")},
4778                                       "history");
4779                 }
4780                 print "</td>\n";
4781         } else {
4782                 # unknown object: we can only present history for it
4783                 # (this includes 'commit' object, i.e. submodule support)
4784                 print "<td class=\"list\">" .
4785                       esc_path($t->{'name'}) .
4786                       "</td>\n";
4787                 print "<td class=\"link\">";
4788                 if (defined $hash_base) {
4789                         print $cgi->a({-href => href(action=>"history",
4790                                                      hash_base=>$hash_base,
4791                                                      file_name=>"$basedir$t->{'name'}")},
4792                                       "history");
4793                 }
4794                 print "</td>\n";
4795         }
4796 }
4797
4798 ## ......................................................................
4799 ## functions printing large fragments of HTML
4800
4801 # get pre-image filenames for merge (combined) diff
4802 sub fill_from_file_info {
4803         my ($diff, @parents) = @_;
4804
4805         $diff->{'from_file'} = [ ];
4806         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4807         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4808                 if ($diff->{'status'}[$i] eq 'R' ||
4809                     $diff->{'status'}[$i] eq 'C') {
4810                         $diff->{'from_file'}[$i] =
4811                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4812                 }
4813         }
4814
4815         return $diff;
4816 }
4817
4818 # is current raw difftree line of file deletion
4819 sub is_deleted {
4820         my $diffinfo = shift;
4821
4822         return $diffinfo->{'to_id'} eq ('0' x 40);
4823 }
4824
4825 # does patch correspond to [previous] difftree raw line
4826 # $diffinfo  - hashref of parsed raw diff format
4827 # $patchinfo - hashref of parsed patch diff format
4828 #              (the same keys as in $diffinfo)
4829 sub is_patch_split {
4830         my ($diffinfo, $patchinfo) = @_;
4831
4832         return defined $diffinfo && defined $patchinfo
4833                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4834 }
4835
4836
4837 sub git_difftree_body {
4838         my ($difftree, $hash, @parents) = @_;
4839         my ($parent) = $parents[0];
4840         my $have_blame = gitweb_check_feature('blame');
4841         print "<div class=\"list_head\">\n";
4842         if ($#{$difftree} > 10) {
4843                 print(($#{$difftree} + 1) . " files changed:\n");
4844         }
4845         print "</div>\n";
4846
4847         print "<table class=\"" .
4848               (@parents > 1 ? "combined " : "") .
4849               "diff_tree\">\n";
4850
4851         # header only for combined diff in 'commitdiff' view
4852         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4853         if ($has_header) {
4854                 # table header
4855                 print "<thead><tr>\n" .
4856                        "<th></th><th></th>\n"; # filename, patchN link
4857                 for (my $i = 0; $i < @parents; $i++) {
4858                         my $par = $parents[$i];
4859                         print "<th>" .
4860                               $cgi->a({-href => href(action=>"commitdiff",
4861                                                      hash=>$hash, hash_parent=>$par),
4862                                        -title => 'commitdiff to parent number ' .
4863                                                   ($i+1) . ': ' . substr($par,0,7)},
4864                                       $i+1) .
4865                               "&nbsp;</th>\n";
4866                 }
4867                 print "</tr></thead>\n<tbody>\n";
4868         }
4869
4870         my $alternate = 1;
4871         my $patchno = 0;
4872         foreach my $line (@{$difftree}) {
4873                 my $diff = parsed_difftree_line($line);
4874
4875                 if ($alternate) {
4876                         print "<tr class=\"dark\">\n";
4877                 } else {
4878                         print "<tr class=\"light\">\n";
4879                 }
4880                 $alternate ^= 1;
4881
4882                 if (exists $diff->{'nparents'}) { # combined diff
4883
4884                         fill_from_file_info($diff, @parents)
4885                                 unless exists $diff->{'from_file'};
4886
4887                         if (!is_deleted($diff)) {
4888                                 # file exists in the result (child) commit
4889                                 print "<td>" .
4890                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4891                                                              file_name=>$diff->{'to_file'},
4892                                                              hash_base=>$hash),
4893                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4894                                       "</td>\n";
4895                         } else {
4896                                 print "<td>" .
4897                                       esc_path($diff->{'to_file'}) .
4898                                       "</td>\n";
4899                         }
4900
4901                         if ($action eq 'commitdiff') {
4902                                 # link to patch
4903                                 $patchno++;
4904                                 print "<td class=\"link\">" .
4905                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4906                                               "patch") .
4907                                       " | " .
4908                                       "</td>\n";
4909                         }
4910
4911                         my $has_history = 0;
4912                         my $not_deleted = 0;
4913                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4914                                 my $hash_parent = $parents[$i];
4915                                 my $from_hash = $diff->{'from_id'}[$i];
4916                                 my $from_path = $diff->{'from_file'}[$i];
4917                                 my $status = $diff->{'status'}[$i];
4918
4919                                 $has_history ||= ($status ne 'A');
4920                                 $not_deleted ||= ($status ne 'D');
4921
4922                                 if ($status eq 'A') {
4923                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4924                                 } elsif ($status eq 'D') {
4925                                         print "<td class=\"link\">" .
4926                                               $cgi->a({-href => href(action=>"blob",
4927                                                                      hash_base=>$hash,
4928                                                                      hash=>$from_hash,
4929                                                                      file_name=>$from_path)},
4930                                                       "blob" . ($i+1)) .
4931                                               " | </td>\n";
4932                                 } else {
4933                                         if ($diff->{'to_id'} eq $from_hash) {
4934                                                 print "<td class=\"link nochange\">";
4935                                         } else {
4936                                                 print "<td class=\"link\">";
4937                                         }
4938                                         print $cgi->a({-href => href(action=>"blobdiff",
4939                                                                      hash=>$diff->{'to_id'},
4940                                                                      hash_parent=>$from_hash,
4941                                                                      hash_base=>$hash,
4942                                                                      hash_parent_base=>$hash_parent,
4943                                                                      file_name=>$diff->{'to_file'},
4944                                                                      file_parent=>$from_path)},
4945                                                       "diff" . ($i+1)) .
4946                                               " | </td>\n";
4947                                 }
4948                         }
4949
4950                         print "<td class=\"link\">";
4951                         if ($not_deleted) {
4952                                 print $cgi->a({-href => href(action=>"blob",
4953                                                              hash=>$diff->{'to_id'},
4954                                                              file_name=>$diff->{'to_file'},
4955                                                              hash_base=>$hash)},
4956                                               "blob");
4957                                 print " | " if ($has_history);
4958                         }
4959                         if ($has_history) {
4960                                 print $cgi->a({-href => href(action=>"history",
4961                                                              file_name=>$diff->{'to_file'},
4962                                                              hash_base=>$hash)},
4963                                               "history");
4964                         }
4965                         print "</td>\n";
4966
4967                         print "</tr>\n";
4968                         next; # instead of 'else' clause, to avoid extra indent
4969                 }
4970                 # else ordinary diff
4971
4972                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4973                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4974                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4975                         $to_mode_oct = oct $diff->{'to_mode'};
4976                         if (S_ISREG($to_mode_oct)) { # only for regular file
4977                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4978                         }
4979                         $to_file_type = file_type($diff->{'to_mode'});
4980                 }
4981                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4982                         $from_mode_oct = oct $diff->{'from_mode'};
4983                         if (S_ISREG($from_mode_oct)) { # only for regular file
4984                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4985                         }
4986                         $from_file_type = file_type($diff->{'from_mode'});
4987                 }
4988
4989                 if ($diff->{'status'} eq "A") { # created
4990                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4991                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4992                         $mode_chng   .= "]</span>";
4993                         print "<td>";
4994                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4995                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4996                                       -class => "list"}, esc_path($diff->{'file'}));
4997                         print "</td>\n";
4998                         print "<td>$mode_chng</td>\n";
4999                         print "<td class=\"link\">";
5000                         if ($action eq 'commitdiff') {
5001                                 # link to patch
5002                                 $patchno++;
5003                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5004                                               "patch") .
5005                                       " | ";
5006                         }
5007                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5008                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5009                                       "blob");
5010                         print "</td>\n";
5011
5012                 } elsif ($diff->{'status'} eq "D") { # deleted
5013                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5014                         print "<td>";
5015                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5016                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5017                                        -class => "list"}, esc_path($diff->{'file'}));
5018                         print "</td>\n";
5019                         print "<td>$mode_chng</td>\n";
5020                         print "<td class=\"link\">";
5021                         if ($action eq 'commitdiff') {
5022                                 # link to patch
5023                                 $patchno++;
5024                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5025                                               "patch") .
5026                                       " | ";
5027                         }
5028                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5029                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5030                                       "blob") . " | ";
5031                         if ($have_blame) {
5032                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5033                                                              file_name=>$diff->{'file'}),
5034                                               -class => "blamelink"},
5035                                               "blame") . " | ";
5036                         }
5037                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5038                                                      file_name=>$diff->{'file'})},
5039                                       "history");
5040                         print "</td>\n";
5041
5042                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5043                         my $mode_chnge = "";
5044                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5045                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5046                                 if ($from_file_type ne $to_file_type) {
5047                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5048                                 }
5049                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5050                                         if ($from_mode_str && $to_mode_str) {
5051                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5052                                         } elsif ($to_mode_str) {
5053                                                 $mode_chnge .= " mode: $to_mode_str";
5054                                         }
5055                                 }
5056                                 $mode_chnge .= "]</span>\n";
5057                         }
5058                         print "<td>";
5059                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5060                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5061                                       -class => "list"}, esc_path($diff->{'file'}));
5062                         print "</td>\n";
5063                         print "<td>$mode_chnge</td>\n";
5064                         print "<td class=\"link\">";
5065                         if ($action eq 'commitdiff') {
5066                                 # link to patch
5067                                 $patchno++;
5068                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5069                                               "patch") .
5070                                       " | ";
5071                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5072                                 # "commit" view and modified file (not onlu mode changed)
5073                                 print $cgi->a({-href => href(action=>"blobdiff",
5074                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5075                                                              hash_base=>$hash, hash_parent_base=>$parent,
5076                                                              file_name=>$diff->{'file'})},
5077                                               "diff") .
5078                                       " | ";
5079                         }
5080                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5081                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5082                                        "blob") . " | ";
5083                         if ($have_blame) {
5084                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5085                                                              file_name=>$diff->{'file'}),
5086                                               -class => "blamelink"},
5087                                               "blame") . " | ";
5088                         }
5089                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5090                                                      file_name=>$diff->{'file'})},
5091                                       "history");
5092                         print "</td>\n";
5093
5094                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5095                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5096                         my $nstatus = $status_name{$diff->{'status'}};
5097                         my $mode_chng = "";
5098                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5099                                 # mode also for directories, so we cannot use $to_mode_str
5100                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5101                         }
5102                         print "<td>" .
5103                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5104                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5105                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5106                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5107                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5108                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5109                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5110                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5111                               "<td class=\"link\">";
5112                         if ($action eq 'commitdiff') {
5113                                 # link to patch
5114                                 $patchno++;
5115                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5116                                               "patch") .
5117                                       " | ";
5118                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5119                                 # "commit" view and modified file (not only pure rename or copy)
5120                                 print $cgi->a({-href => href(action=>"blobdiff",
5121                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5122                                                              hash_base=>$hash, hash_parent_base=>$parent,
5123                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5124                                               "diff") .
5125                                       " | ";
5126                         }
5127                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5128                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5129                                       "blob") . " | ";
5130                         if ($have_blame) {
5131                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5132                                                              file_name=>$diff->{'to_file'}),
5133                                               -class => "blamelink"},
5134                                               "blame") . " | ";
5135                         }
5136                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5137                                                     file_name=>$diff->{'to_file'})},
5138                                       "history");
5139                         print "</td>\n";
5140
5141                 } # we should not encounter Unmerged (U) or Unknown (X) status
5142                 print "</tr>\n";
5143         }
5144         print "</tbody>" if $has_header;
5145         print "</table>\n";
5146 }
5147
5148 # Print context lines and then rem/add lines in a side-by-side manner.
5149 sub print_sidebyside_diff_lines {
5150         my ($ctx, $rem, $add) = @_;
5151
5152         # print context block before add/rem block
5153         if (@$ctx) {
5154                 print join '',
5155                         '<div class="chunk_block ctx">',
5156                                 '<div class="old">',
5157                                 @$ctx,
5158                                 '</div>',
5159                                 '<div class="new">',
5160                                 @$ctx,
5161                                 '</div>',
5162                         '</div>';
5163         }
5164
5165         if (!@$add) {
5166                 # pure removal
5167                 print join '',
5168                         '<div class="chunk_block rem">',
5169                                 '<div class="old">',
5170                                 @$rem,
5171                                 '</div>',
5172                         '</div>';
5173         } elsif (!@$rem) {
5174                 # pure addition
5175                 print join '',
5176                         '<div class="chunk_block add">',
5177                                 '<div class="new">',
5178                                 @$add,
5179                                 '</div>',
5180                         '</div>';
5181         } else {
5182                 print join '',
5183                         '<div class="chunk_block chg">',
5184                                 '<div class="old">',
5185                                 @$rem,
5186                                 '</div>',
5187                                 '<div class="new">',
5188                                 @$add,
5189                                 '</div>',
5190                         '</div>';
5191         }
5192 }
5193
5194 # Print context lines and then rem/add lines in inline manner.
5195 sub print_inline_diff_lines {
5196         my ($ctx, $rem, $add) = @_;
5197
5198         print @$ctx, @$rem, @$add;
5199 }
5200
5201 # Format removed and added line, mark changed part and HTML-format them.
5202 # Implementation is based on contrib/diff-highlight
5203 sub format_rem_add_lines_pair {
5204         my ($rem, $add, $num_parents) = @_;
5205
5206         # We need to untabify lines before split()'ing them;
5207         # otherwise offsets would be invalid.
5208         chomp $rem;
5209         chomp $add;
5210         $rem = untabify($rem);
5211         $add = untabify($add);
5212
5213         my @rem = split(//, $rem);
5214         my @add = split(//, $add);
5215         my ($esc_rem, $esc_add);
5216         # Ignore leading +/- characters for each parent.
5217         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5218         my ($prefix_has_nonspace, $suffix_has_nonspace);
5219
5220         my $shorter = (@rem < @add) ? @rem : @add;
5221         while ($prefix_len < $shorter) {
5222                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5223
5224                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5225                 $prefix_len++;
5226         }
5227
5228         while ($prefix_len + $suffix_len < $shorter) {
5229                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5230
5231                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5232                 $suffix_len++;
5233         }
5234
5235         # Mark lines that are different from each other, but have some common
5236         # part that isn't whitespace.  If lines are completely different, don't
5237         # mark them because that would make output unreadable, especially if
5238         # diff consists of multiple lines.
5239         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5240                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5241                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5242                 $esc_add = esc_html_hl_regions($add, 'marked',
5243                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5244         } else {
5245                 $esc_rem = esc_html($rem, -nbsp=>1);
5246                 $esc_add = esc_html($add, -nbsp=>1);
5247         }
5248
5249         return format_diff_line(\$esc_rem, 'rem'),
5250                format_diff_line(\$esc_add, 'add');
5251 }
5252
5253 # HTML-format diff context, removed and added lines.
5254 sub format_ctx_rem_add_lines {
5255         my ($ctx, $rem, $add, $num_parents) = @_;
5256         my (@new_ctx, @new_rem, @new_add);
5257         my $can_highlight = 0;
5258         my $is_combined = ($num_parents > 1);
5259
5260         # Highlight if every removed line has a corresponding added line.
5261         if (@$add > 0 && @$add == @$rem) {
5262                 $can_highlight = 1;
5263
5264                 # Highlight lines in combined diff only if the chunk contains
5265                 # diff between the same version, e.g.
5266                 #
5267                 #    - a
5268                 #   -  b
5269                 #    + c
5270                 #   +  d
5271                 #
5272                 # Otherwise the highlightling would be confusing.
5273                 if ($is_combined) {
5274                         for (my $i = 0; $i < @$add; $i++) {
5275                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5276                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5277
5278                                 $prefix_rem =~ s/-/+/g;
5279
5280                                 if ($prefix_rem ne $prefix_add) {
5281                                         $can_highlight = 0;
5282                                         last;
5283                                 }
5284                         }
5285                 }
5286         }
5287
5288         if ($can_highlight) {
5289                 for (my $i = 0; $i < @$add; $i++) {
5290                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5291                                 $rem->[$i], $add->[$i], $num_parents);
5292                         push @new_rem, $line_rem;
5293                         push @new_add, $line_add;
5294                 }
5295         } else {
5296                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5297                 @new_add = map { format_diff_line($_, 'add') } @$add;
5298         }
5299
5300         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5301
5302         return (\@new_ctx, \@new_rem, \@new_add);
5303 }
5304
5305 # Print context lines and then rem/add lines.
5306 sub print_diff_lines {
5307         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5308         my $is_combined = $num_parents > 1;
5309
5310         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5311                 $num_parents);
5312
5313         if ($diff_style eq 'sidebyside' && !$is_combined) {
5314                 print_sidebyside_diff_lines($ctx, $rem, $add);
5315         } else {
5316                 # default 'inline' style and unknown styles
5317                 print_inline_diff_lines($ctx, $rem, $add);
5318         }
5319 }
5320
5321 sub print_diff_chunk {
5322         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5323         my (@ctx, @rem, @add);
5324
5325         # The class of the previous line.
5326         my $prev_class = '';
5327
5328         return unless @chunk;
5329
5330         # incomplete last line might be among removed or added lines,
5331         # or both, or among context lines: find which
5332         for (my $i = 1; $i < @chunk; $i++) {
5333                 if ($chunk[$i][0] eq 'incomplete') {
5334                         $chunk[$i][0] = $chunk[$i-1][0];
5335                 }
5336         }
5337
5338         # guardian
5339         push @chunk, ["", ""];
5340
5341         foreach my $line_info (@chunk) {
5342                 my ($class, $line) = @$line_info;
5343
5344                 # print chunk headers
5345                 if ($class && $class eq 'chunk_header') {
5346                         print format_diff_line($line, $class, $from, $to);
5347                         next;
5348                 }
5349
5350                 ## print from accumulator when have some add/rem lines or end
5351                 # of chunk (flush context lines), or when have add and rem
5352                 # lines and new block is reached (otherwise add/rem lines could
5353                 # be reordered)
5354                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5355                     (@rem && @add && $class ne $prev_class)) {
5356                         print_diff_lines(\@ctx, \@rem, \@add,
5357                                          $diff_style, $num_parents);
5358                         @ctx = @rem = @add = ();
5359                 }
5360
5361                 ## adding lines to accumulator
5362                 # guardian value
5363                 last unless $line;
5364                 # rem, add or change
5365                 if ($class eq 'rem') {
5366                         push @rem, $line;
5367                 } elsif ($class eq 'add') {
5368                         push @add, $line;
5369                 }
5370                 # context line
5371                 if ($class eq 'ctx') {
5372                         push @ctx, $line;
5373                 }
5374
5375                 $prev_class = $class;
5376         }
5377 }
5378
5379 sub git_patchset_body {
5380         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5381         my ($hash_parent) = $hash_parents[0];
5382
5383         my $is_combined = (@hash_parents > 1);
5384         my $patch_idx = 0;
5385         my $patch_number = 0;
5386         my $patch_line;
5387         my $diffinfo;
5388         my $to_name;
5389         my (%from, %to);
5390         my @chunk; # for side-by-side diff
5391
5392         print "<div class=\"patchset\">\n";
5393
5394         # skip to first patch
5395         while ($patch_line = <$fd>) {
5396                 chomp $patch_line;
5397
5398                 last if ($patch_line =~ m/^diff /);
5399         }
5400
5401  PATCH:
5402         while ($patch_line) {
5403
5404                 # parse "git diff" header line
5405                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5406                         # $1 is from_name, which we do not use
5407                         $to_name = unquote($2);
5408                         $to_name =~ s!^b/!!;
5409                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5410                         # $1 is 'cc' or 'combined', which we do not use
5411                         $to_name = unquote($2);
5412                 } else {
5413                         $to_name = undef;
5414                 }
5415
5416                 # check if current patch belong to current raw line
5417                 # and parse raw git-diff line if needed
5418                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5419                         # this is continuation of a split patch
5420                         print "<div class=\"patch cont\">\n";
5421                 } else {
5422                         # advance raw git-diff output if needed
5423                         $patch_idx++ if defined $diffinfo;
5424
5425                         # read and prepare patch information
5426                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5427
5428                         # compact combined diff output can have some patches skipped
5429                         # find which patch (using pathname of result) we are at now;
5430                         if ($is_combined) {
5431                                 while ($to_name ne $diffinfo->{'to_file'}) {
5432                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5433                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5434                                               "</div>\n";  # class="patch"
5435
5436                                         $patch_idx++;
5437                                         $patch_number++;
5438
5439                                         last if $patch_idx > $#$difftree;
5440                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5441                                 }
5442                         }
5443
5444                         # modifies %from, %to hashes
5445                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5446
5447                         # this is first patch for raw difftree line with $patch_idx index
5448                         # we index @$difftree array from 0, but number patches from 1
5449                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5450                 }
5451
5452                 # git diff header
5453                 #assert($patch_line =~ m/^diff /) if DEBUG;
5454                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5455                 $patch_number++;
5456                 # print "git diff" header
5457                 print format_git_diff_header_line($patch_line, $diffinfo,
5458                                                   \%from, \%to);
5459
5460                 # print extended diff header
5461                 print "<div class=\"diff extended_header\">\n";
5462         EXTENDED_HEADER:
5463                 while ($patch_line = <$fd>) {
5464                         chomp $patch_line;
5465
5466                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5467
5468                         print format_extended_diff_header_line($patch_line, $diffinfo,
5469                                                                \%from, \%to);
5470                 }
5471                 print "</div>\n"; # class="diff extended_header"
5472
5473                 # from-file/to-file diff header
5474                 if (! $patch_line) {
5475                         print "</div>\n"; # class="patch"
5476                         last PATCH;
5477                 }
5478                 next PATCH if ($patch_line =~ m/^diff /);
5479                 #assert($patch_line =~ m/^---/) if DEBUG;
5480
5481                 my $last_patch_line = $patch_line;
5482                 $patch_line = <$fd>;
5483                 chomp $patch_line;
5484                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5485
5486                 print format_diff_from_to_header($last_patch_line, $patch_line,
5487                                                  $diffinfo, \%from, \%to,
5488                                                  @hash_parents);
5489
5490                 # the patch itself
5491         LINE:
5492                 while ($patch_line = <$fd>) {
5493                         chomp $patch_line;
5494
5495                         next PATCH if ($patch_line =~ m/^diff /);
5496
5497                         my $class = diff_line_class($patch_line, \%from, \%to);
5498
5499                         if ($class eq 'chunk_header') {
5500                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5501                                 @chunk = ();
5502                         }
5503
5504                         push @chunk, [ $class, $patch_line ];
5505                 }
5506
5507         } continue {
5508                 if (@chunk) {
5509                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5510                         @chunk = ();
5511                 }
5512                 print "</div>\n"; # class="patch"
5513         }
5514
5515         # for compact combined (--cc) format, with chunk and patch simplification
5516         # the patchset might be empty, but there might be unprocessed raw lines
5517         for (++$patch_idx if $patch_number > 0;
5518              $patch_idx < @$difftree;
5519              ++$patch_idx) {
5520                 # read and prepare patch information
5521                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5522
5523                 # generate anchor for "patch" links in difftree / whatchanged part
5524                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5525                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5526                       "</div>\n";  # class="patch"
5527
5528                 $patch_number++;
5529         }
5530
5531         if ($patch_number == 0) {
5532                 if (@hash_parents > 1) {
5533                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5534                 } else {
5535                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5536                 }
5537         }
5538
5539         print "</div>\n"; # class="patchset"
5540 }
5541
5542 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5543
5544 sub git_project_search_form {
5545         my ($searchtext, $search_use_regexp) = @_;
5546
5547         my $limit = '';
5548         if ($project_filter) {
5549                 $limit = " in '$project_filter/'";
5550         }
5551
5552         print "<div class=\"projsearch\">\n";
5553         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5554               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5555         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5556                 if (defined $project_filter);
5557         print $cgi->textfield(-name => 's', -value => $searchtext,
5558                               -title => "Search project by name and description$limit",
5559                               -size => 60) . "\n" .
5560               "<span title=\"Extended regular expression\">" .
5561               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5562                              -checked => $search_use_regexp) .
5563               "</span>\n" .
5564               $cgi->submit(-name => 'btnS', -value => 'Search') .
5565               $cgi->end_form() . "\n" .
5566               $cgi->a({-href => href(project => undef, searchtext => undef,
5567                                      project_filter => $project_filter)},
5568                       esc_html("List all projects$limit")) . "<br />\n";
5569         print "</div>\n";
5570 }
5571
5572 # entry for given @keys needs filling if at least one of keys in list
5573 # is not present in %$project_info
5574 sub project_info_needs_filling {
5575         my ($project_info, @keys) = @_;
5576
5577         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5578         foreach my $key (@keys) {
5579                 if (!exists $project_info->{$key}) {
5580                         return 1;
5581                 }
5582         }
5583         return;
5584 }
5585
5586 # fills project list info (age, description, owner, category, forks, etc.)
5587 # for each project in the list, removing invalid projects from
5588 # returned list, or fill only specified info.
5589 #
5590 # Invalid projects are removed from the returned list if and only if you
5591 # ask 'age' or 'age_string' to be filled, because they are the only fields
5592 # that run unconditionally git command that requires repository, and
5593 # therefore do always check if project repository is invalid.
5594 #
5595 # USAGE:
5596 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5597 #   ensures that 'descr_long' and 'ctags' fields are filled
5598 # * @project_list = fill_project_list_info(\@project_list)
5599 #   ensures that all fields are filled (and invalid projects removed)
5600 #
5601 # NOTE: modifies $projlist, but does not remove entries from it
5602 sub fill_project_list_info {
5603         my ($projlist, @wanted_keys) = @_;
5604         my @projects;
5605         my $filter_set = sub { return @_; };
5606         if (@wanted_keys) {
5607                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5608                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5609         }
5610
5611         my $show_ctags = gitweb_check_feature('ctags');
5612  PROJECT:
5613         foreach my $pr (@$projlist) {
5614                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5615                         my (@activity) = git_get_last_activity($pr->{'path'});
5616                         unless (@activity) {
5617                                 next PROJECT;
5618                         }
5619                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5620                 }
5621                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5622                         my $descr = git_get_project_description($pr->{'path'}) || "";
5623                         $descr = to_utf8($descr);
5624                         $pr->{'descr_long'} = $descr;
5625                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5626                 }
5627                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5628                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5629                 }
5630                 if ($show_ctags &&
5631                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5632                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5633                 }
5634                 if ($projects_list_group_categories &&
5635                     project_info_needs_filling($pr, $filter_set->('category'))) {
5636                         my $cat = git_get_project_category($pr->{'path'}) ||
5637                                                            $project_list_default_category;
5638                         $pr->{'category'} = to_utf8($cat);
5639                 }
5640
5641                 push @projects, $pr;
5642         }
5643
5644         return @projects;
5645 }
5646
5647 sub sort_projects_list {
5648         my ($projlist, $order) = @_;
5649
5650         sub order_str {
5651                 my $key = shift;
5652                 return sub { $a->{$key} cmp $b->{$key} };
5653         }
5654
5655         sub order_num_then_undef {
5656                 my $key = shift;
5657                 return sub {
5658                         defined $a->{$key} ?
5659                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5660                                 (defined $b->{$key} ? 1 : 0)
5661                 };
5662         }
5663
5664         my %orderings = (
5665                 project => order_str('path'),
5666                 descr => order_str('descr_long'),
5667                 owner => order_str('owner'),
5668                 age => order_num_then_undef('age'),
5669         );
5670
5671         my $ordering = $orderings{$order};
5672         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5673 }
5674
5675 # returns a hash of categories, containing the list of project
5676 # belonging to each category
5677 sub build_projlist_by_category {
5678         my ($projlist, $from, $to) = @_;
5679         my %categories;
5680
5681         $from = 0 unless defined $from;
5682         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5683
5684         for (my $i = $from; $i <= $to; $i++) {
5685                 my $pr = $projlist->[$i];
5686                 push @{$categories{ $pr->{'category'} }}, $pr;
5687         }
5688
5689         return wantarray ? %categories : \%categories;
5690 }
5691
5692 # print 'sort by' <th> element, generating 'sort by $name' replay link
5693 # if that order is not selected
5694 sub print_sort_th {
5695         print format_sort_th(@_);
5696 }
5697
5698 sub format_sort_th {
5699         my ($name, $order, $header) = @_;
5700         my $sort_th = "";
5701         $header ||= ucfirst($name);
5702
5703         if ($order eq $name) {
5704                 $sort_th .= "<th>$header</th>\n";
5705         } else {
5706                 $sort_th .= "<th>" .
5707                             $cgi->a({-href => href(-replay=>1, order=>$name),
5708                                      -class => "header"}, $header) .
5709                             "</th>\n";
5710         }
5711
5712         return $sort_th;
5713 }
5714
5715 sub git_project_list_rows {
5716         my ($projlist, $from, $to, $check_forks) = @_;
5717
5718         $from = 0 unless defined $from;
5719         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5720
5721         my $alternate = 1;
5722         for (my $i = $from; $i <= $to; $i++) {
5723                 my $pr = $projlist->[$i];
5724
5725                 if ($alternate) {
5726                         print "<tr class=\"dark\">\n";
5727                 } else {
5728                         print "<tr class=\"light\">\n";
5729                 }
5730                 $alternate ^= 1;
5731
5732                 if ($check_forks) {
5733                         print "<td>";
5734                         if ($pr->{'forks'}) {
5735                                 my $nforks = scalar @{$pr->{'forks'}};
5736                                 if ($nforks > 0) {
5737                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5738                                                        -title => "$nforks forks"}, "+");
5739                                 } else {
5740                                         print $cgi->span({-title => "$nforks forks"}, "+");
5741                                 }
5742                         }
5743                         print "</td>\n";
5744                 }
5745                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5746                                         -class => "list"},
5747                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5748                       "</td>\n" .
5749                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5750                                         -class => "list",
5751                                         -title => $pr->{'descr_long'}},
5752                                         $search_regexp
5753                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5754                                                                     $pr->{'descr'}, $search_regexp)
5755                                         : esc_html($pr->{'descr'})) .
5756                       "</td>\n";
5757                 unless ($omit_owner) {
5758                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5759                 }
5760                 unless ($omit_age_column) {
5761                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5762                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5763                 }
5764                 print"<td class=\"link\">" .
5765                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5766                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5767                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5768                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5769                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5770                       "</td>\n" .
5771                       "</tr>\n";
5772         }
5773 }
5774
5775 sub git_project_list_body {
5776         # actually uses global variable $project
5777         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5778         my @projects = @$projlist;
5779
5780         my $check_forks = gitweb_check_feature('forks');
5781         my $show_ctags  = gitweb_check_feature('ctags');
5782         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5783         $check_forks = undef
5784                 if ($tagfilter || $search_regexp);
5785
5786         # filtering out forks before filling info allows to do less work
5787         @projects = filter_forks_from_projects_list(\@projects)
5788                 if ($check_forks);
5789         # search_projects_list pre-fills required info
5790         @projects = search_projects_list(\@projects,
5791                                          'search_regexp' => $search_regexp,
5792                                          'tagfilter'  => $tagfilter)
5793                 if ($tagfilter || $search_regexp);
5794         # fill the rest
5795         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5796         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5797         push @all_fields, 'owner' unless($omit_owner);
5798         @projects = fill_project_list_info(\@projects, @all_fields);
5799
5800         $order ||= $default_projects_order;
5801         $from = 0 unless defined $from;
5802         $to = $#projects if (!defined $to || $#projects < $to);
5803
5804         # short circuit
5805         if ($from > $to) {
5806                 print "<center>\n".
5807                       "<b>No such projects found</b><br />\n".
5808                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5809                       "</center>\n<br />\n";
5810                 return;
5811         }
5812
5813         @projects = sort_projects_list(\@projects, $order);
5814
5815         if ($show_ctags) {
5816                 my $ctags = git_gather_all_ctags(\@projects);
5817                 my $cloud = git_populate_project_tagcloud($ctags);
5818                 print git_show_project_tagcloud($cloud, 64);
5819         }
5820
5821         print "<table class=\"project_list\">\n";
5822         unless ($no_header) {
5823                 print "<tr>\n";
5824                 if ($check_forks) {
5825                         print "<th></th>\n";
5826                 }
5827                 print_sort_th('project', $order, 'Project');
5828                 print_sort_th('descr', $order, 'Description');
5829                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5830                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5831                 print "<th></th>\n" . # for links
5832                       "</tr>\n";
5833         }
5834
5835         if ($projects_list_group_categories) {
5836                 # only display categories with projects in the $from-$to window
5837                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5838                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5839                 foreach my $cat (sort keys %categories) {
5840                         unless ($cat eq "") {
5841                                 print "<tr>\n";
5842                                 if ($check_forks) {
5843                                         print "<td></td>\n";
5844                                 }
5845                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5846                                 print "</tr>\n";
5847                         }
5848
5849                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5850                 }
5851         } else {
5852                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5853         }
5854
5855         if (defined $extra) {
5856                 print "<tr>\n";
5857                 if ($check_forks) {
5858                         print "<td></td>\n";
5859                 }
5860                 print "<td colspan=\"5\">$extra</td>\n" .
5861                       "</tr>\n";
5862         }
5863         print "</table>\n";
5864 }
5865
5866 sub git_log_body {
5867         # uses global variable $project
5868         my ($commitlist, $from, $to, $refs, $extra) = @_;
5869
5870         $from = 0 unless defined $from;
5871         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5872
5873         for (my $i = 0; $i <= $to; $i++) {
5874                 my %co = %{$commitlist->[$i]};
5875                 next if !%co;
5876                 my $commit = $co{'id'};
5877                 my $ref = format_ref_marker($refs, $commit);
5878                 git_print_header_div('commit',
5879                                "<span class=\"age\">$co{'age_string'}</span>" .
5880                                esc_html($co{'title'}) . $ref,
5881                                $commit);
5882                 print "<div class=\"title_text\">\n" .
5883                       "<div class=\"log_link\">\n" .
5884                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5885                       " | " .
5886                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5887                       " | " .
5888                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5889                       "<br/>\n" .
5890                       "</div>\n";
5891                       git_print_authorship(\%co, -tag => 'span');
5892                       print "<br/>\n</div>\n";
5893
5894                 print "<div class=\"log_body\">\n";
5895                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5896                 print "</div>\n";
5897         }
5898         if ($extra) {
5899                 print "<div class=\"page_nav\">\n";
5900                 print "$extra\n";
5901                 print "</div>\n";
5902         }
5903 }
5904
5905 sub git_shortlog_body {
5906         # uses global variable $project
5907         my ($commitlist, $from, $to, $refs, $extra) = @_;
5908
5909         $from = 0 unless defined $from;
5910         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5911
5912         print "<table class=\"shortlog\">\n";
5913         my $alternate = 1;
5914         for (my $i = $from; $i <= $to; $i++) {
5915                 my %co = %{$commitlist->[$i]};
5916                 my $commit = $co{'id'};
5917                 my $ref = format_ref_marker($refs, $commit);
5918                 if ($alternate) {
5919                         print "<tr class=\"dark\">\n";
5920                 } else {
5921                         print "<tr class=\"light\">\n";
5922                 }
5923                 $alternate ^= 1;
5924                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5925                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5926                       format_author_html('td', \%co, 10) . "<td>";
5927                 print format_subject_html($co{'title'}, $co{'title_short'},
5928                                           href(action=>"commit", hash=>$commit), $ref);
5929                 print "</td>\n" .
5930                       "<td class=\"link\">" .
5931                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5932                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5933                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5934                 my $snapshot_links = format_snapshot_links($commit);
5935                 if (defined $snapshot_links) {
5936                         print " | " . $snapshot_links;
5937                 }
5938                 print "</td>\n" .
5939                       "</tr>\n";
5940         }
5941         if (defined $extra) {
5942                 print "<tr>\n" .
5943                       "<td colspan=\"4\">$extra</td>\n" .
5944                       "</tr>\n";
5945         }
5946         print "</table>\n";
5947 }
5948
5949 sub git_history_body {
5950         # Warning: assumes constant type (blob or tree) during history
5951         my ($commitlist, $from, $to, $refs, $extra,
5952             $file_name, $file_hash, $ftype) = @_;
5953
5954         $from = 0 unless defined $from;
5955         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5956
5957         print "<table class=\"history\">\n";
5958         my $alternate = 1;
5959         for (my $i = $from; $i <= $to; $i++) {
5960                 my %co = %{$commitlist->[$i]};
5961                 if (!%co) {
5962                         next;
5963                 }
5964                 my $commit = $co{'id'};
5965
5966                 my $ref = format_ref_marker($refs, $commit);
5967
5968                 if ($alternate) {
5969                         print "<tr class=\"dark\">\n";
5970                 } else {
5971                         print "<tr class=\"light\">\n";
5972                 }
5973                 $alternate ^= 1;
5974                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5975         # shortlog:   format_author_html('td', \%co, 10)
5976                       format_author_html('td', \%co, 15, 3) . "<td>";
5977                 # originally git_history used chop_str($co{'title'}, 50)
5978                 print format_subject_html($co{'title'}, $co{'title_short'},
5979                                           href(action=>"commit", hash=>$commit), $ref);
5980                 print "</td>\n" .
5981                       "<td class=\"link\">" .
5982                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5983                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5984
5985                 if ($ftype eq 'blob') {
5986                         my $blob_current = $file_hash;
5987                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5988                         if (defined $blob_current && defined $blob_parent &&
5989                                         $blob_current ne $blob_parent) {
5990                                 print " | " .
5991                                         $cgi->a({-href => href(action=>"blobdiff",
5992                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5993                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5994                                                                file_name=>$file_name)},
5995                                                 "diff to current");
5996                         }
5997                 }
5998                 print "</td>\n" .
5999                       "</tr>\n";
6000         }
6001         if (defined $extra) {
6002                 print "<tr>\n" .
6003                       "<td colspan=\"4\">$extra</td>\n" .
6004                       "</tr>\n";
6005         }
6006         print "</table>\n";
6007 }
6008
6009 sub git_tags_body {
6010         # uses global variable $project
6011         my ($taglist, $from, $to, $extra) = @_;
6012         $from = 0 unless defined $from;
6013         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6014
6015         print "<table class=\"tags\">\n";
6016         my $alternate = 1;
6017         for (my $i = $from; $i <= $to; $i++) {
6018                 my $entry = $taglist->[$i];
6019                 my %tag = %$entry;
6020                 my $comment = $tag{'subject'};
6021                 my $comment_short;
6022                 if (defined $comment) {
6023                         $comment_short = chop_str($comment, 30, 5);
6024                 }
6025                 if ($alternate) {
6026                         print "<tr class=\"dark\">\n";
6027                 } else {
6028                         print "<tr class=\"light\">\n";
6029                 }
6030                 $alternate ^= 1;
6031                 if (defined $tag{'age'}) {
6032                         print "<td><i>$tag{'age'}</i></td>\n";
6033                 } else {
6034                         print "<td></td>\n";
6035                 }
6036                 print "<td>" .
6037                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6038                                -class => "list name"}, esc_html($tag{'name'})) .
6039                       "</td>\n" .
6040                       "<td>";
6041                 if (defined $comment) {
6042                         print format_subject_html($comment, $comment_short,
6043                                                   href(action=>"tag", hash=>$tag{'id'}));
6044                 }
6045                 print "</td>\n" .
6046                       "<td class=\"selflink\">";
6047                 if ($tag{'type'} eq "tag") {
6048                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6049                 } else {
6050                         print "&nbsp;";
6051                 }
6052                 print "</td>\n" .
6053                       "<td class=\"link\">" . " | " .
6054                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6055                 if ($tag{'reftype'} eq "commit") {
6056                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6057                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6058                 } elsif ($tag{'reftype'} eq "blob") {
6059                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6060                 }
6061                 print "</td>\n" .
6062                       "</tr>";
6063         }
6064         if (defined $extra) {
6065                 print "<tr>\n" .
6066                       "<td colspan=\"5\">$extra</td>\n" .
6067                       "</tr>\n";
6068         }
6069         print "</table>\n";
6070 }
6071
6072 sub git_heads_body {
6073         # uses global variable $project
6074         my ($headlist, $head_at, $from, $to, $extra) = @_;
6075         $from = 0 unless defined $from;
6076         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6077
6078         print "<table class=\"heads\">\n";
6079         my $alternate = 1;
6080         for (my $i = $from; $i <= $to; $i++) {
6081                 my $entry = $headlist->[$i];
6082                 my %ref = %$entry;
6083                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6084                 if ($alternate) {
6085                         print "<tr class=\"dark\">\n";
6086                 } else {
6087                         print "<tr class=\"light\">\n";
6088                 }
6089                 $alternate ^= 1;
6090                 print "<td><i>$ref{'age'}</i></td>\n" .
6091                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6092                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6093                                -class => "list name"},esc_html($ref{'name'})) .
6094                       "</td>\n" .
6095                       "<td class=\"link\">" .
6096                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6097                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6098                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6099                       "</td>\n" .
6100                       "</tr>";
6101         }
6102         if (defined $extra) {
6103                 print "<tr>\n" .
6104                       "<td colspan=\"3\">$extra</td>\n" .
6105                       "</tr>\n";
6106         }
6107         print "</table>\n";
6108 }
6109
6110 # Display a single remote block
6111 sub git_remote_block {
6112         my ($remote, $rdata, $limit, $head) = @_;
6113
6114         my $heads = $rdata->{'heads'};
6115         my $fetch = $rdata->{'fetch'};
6116         my $push = $rdata->{'push'};
6117
6118         my $urls_table = "<table class=\"projects_list\">\n" ;
6119
6120         if (defined $fetch) {
6121                 if ($fetch eq $push) {
6122                         $urls_table .= format_repo_url("URL", $fetch);
6123                 } else {
6124                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6125                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6126                 }
6127         } elsif (defined $push) {
6128                 $urls_table .= format_repo_url("Push URL", $push);
6129         } else {
6130                 $urls_table .= format_repo_url("", "No remote URL");
6131         }
6132
6133         $urls_table .= "</table>\n";
6134
6135         my $dots;
6136         if (defined $limit && $limit < @$heads) {
6137                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6138         }
6139
6140         print $urls_table;
6141         git_heads_body($heads, $head, 0, $limit, $dots);
6142 }
6143
6144 # Display a list of remote names with the respective fetch and push URLs
6145 sub git_remotes_list {
6146         my ($remotedata, $limit) = @_;
6147         print "<table class=\"heads\">\n";
6148         my $alternate = 1;
6149         my @remotes = sort keys %$remotedata;
6150
6151         my $limited = $limit && $limit < @remotes;
6152
6153         $#remotes = $limit - 1 if $limited;
6154
6155         while (my $remote = shift @remotes) {
6156                 my $rdata = $remotedata->{$remote};
6157                 my $fetch = $rdata->{'fetch'};
6158                 my $push = $rdata->{'push'};
6159                 if ($alternate) {
6160                         print "<tr class=\"dark\">\n";
6161                 } else {
6162                         print "<tr class=\"light\">\n";
6163                 }
6164                 $alternate ^= 1;
6165                 print "<td>" .
6166                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6167                                -class=> "list name"},esc_html($remote)) .
6168                       "</td>";
6169                 print "<td class=\"link\">" .
6170                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6171                       " | " .
6172                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6173                       "</td>";
6174
6175                 print "</tr>\n";
6176         }
6177
6178         if ($limited) {
6179                 print "<tr>\n" .
6180                       "<td colspan=\"3\">" .
6181                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6182                       "</td>\n" . "</tr>\n";
6183         }
6184
6185         print "</table>";
6186 }
6187
6188 # Display remote heads grouped by remote, unless there are too many
6189 # remotes, in which case we only display the remote names
6190 sub git_remotes_body {
6191         my ($remotedata, $limit, $head) = @_;
6192         if ($limit and $limit < keys %$remotedata) {
6193                 git_remotes_list($remotedata, $limit);
6194         } else {
6195                 fill_remote_heads($remotedata);
6196                 while (my ($remote, $rdata) = each %$remotedata) {
6197                         git_print_section({-class=>"remote", -id=>$remote},
6198                                 ["remotes", $remote, $remote], sub {
6199                                         git_remote_block($remote, $rdata, $limit, $head);
6200                                 });
6201                 }
6202         }
6203 }
6204
6205 sub git_search_message {
6206         my %co = @_;
6207
6208         my $greptype;
6209         if ($searchtype eq 'commit') {
6210                 $greptype = "--grep=";
6211         } elsif ($searchtype eq 'author') {
6212                 $greptype = "--author=";
6213         } elsif ($searchtype eq 'committer') {
6214                 $greptype = "--committer=";
6215         }
6216         $greptype .= $searchtext;
6217         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6218                                        $greptype, '--regexp-ignore-case',
6219                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6220
6221         my $paging_nav = '';
6222         if ($page > 0) {
6223                 $paging_nav .=
6224                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6225                                 "first") .
6226                         " &sdot; " .
6227                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6228                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6229         } else {
6230                 $paging_nav .= "first &sdot; prev";
6231         }
6232         my $next_link = '';
6233         if ($#commitlist >= 100) {
6234                 $next_link =
6235                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6236                                  -accesskey => "n", -title => "Alt-n"}, "next");
6237                 $paging_nav .= " &sdot; $next_link";
6238         } else {
6239                 $paging_nav .= " &sdot; next";
6240         }
6241
6242         git_header_html();
6243
6244         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6245         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6246         if ($page == 0 && !@commitlist) {
6247                 print "<p>No match.</p>\n";
6248         } else {
6249                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6250         }
6251
6252         git_footer_html();
6253 }
6254
6255 sub git_search_changes {
6256         my %co = @_;
6257
6258         local $/ = "\n";
6259         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6260                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6261                 ($search_use_regexp ? '--pickaxe-regex' : ())
6262                         or die_error(500, "Open git-log failed");
6263
6264         git_header_html();
6265
6266         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6267         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6268
6269         print "<table class=\"pickaxe search\">\n";
6270         my $alternate = 1;
6271         undef %co;
6272         my @files;
6273         while (my $line = <$fd>) {
6274                 chomp $line;
6275                 next unless $line;
6276
6277                 my %set = parse_difftree_raw_line($line);
6278                 if (defined $set{'commit'}) {
6279                         # finish previous commit
6280                         if (%co) {
6281                                 print "</td>\n" .
6282                                       "<td class=\"link\">" .
6283                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6284                                               "commit") .
6285                                       " | " .
6286                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6287                                                              hash_base=>$co{'id'})},
6288                                               "tree") .
6289                                       "</td>\n" .
6290                                       "</tr>\n";
6291                         }
6292
6293                         if ($alternate) {
6294                                 print "<tr class=\"dark\">\n";
6295                         } else {
6296                                 print "<tr class=\"light\">\n";
6297                         }
6298                         $alternate ^= 1;
6299                         %co = parse_commit($set{'commit'});
6300                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6301                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6302                               "<td><i>$author</i></td>\n" .
6303                               "<td>" .
6304                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6305                                       -class => "list subject"},
6306                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6307                 } elsif (defined $set{'to_id'}) {
6308                         next if ($set{'to_id'} =~ m/^0{40}$/);
6309
6310                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6311                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6312                                       -class => "list"},
6313                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6314                               "<br/>\n";
6315                 }
6316         }
6317         close $fd;
6318
6319         # finish last commit (warning: repetition!)
6320         if (%co) {
6321                 print "</td>\n" .
6322                       "<td class=\"link\">" .
6323                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6324                               "commit") .
6325                       " | " .
6326                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6327                                              hash_base=>$co{'id'})},
6328                               "tree") .
6329                       "</td>\n" .
6330                       "</tr>\n";
6331         }
6332
6333         print "</table>\n";
6334
6335         git_footer_html();
6336 }
6337
6338 sub git_search_files {
6339         my %co = @_;
6340
6341         local $/ = "\n";
6342         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6343                 $search_use_regexp ? ('-E', '-i') : '-F',
6344                 $searchtext, $co{'tree'}
6345                         or die_error(500, "Open git-grep failed");
6346
6347         git_header_html();
6348
6349         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6350         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6351
6352         print "<table class=\"grep_search\">\n";
6353         my $alternate = 1;
6354         my $matches = 0;
6355         my $lastfile = '';
6356         my $file_href;
6357         while (my $line = <$fd>) {
6358                 chomp $line;
6359                 my ($file, $lno, $ltext, $binary);
6360                 last if ($matches++ > 1000);
6361                 if ($line =~ /^Binary file (.+) matches$/) {
6362                         $file = $1;
6363                         $binary = 1;
6364                 } else {
6365                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6366                         $file =~ s/^$co{'tree'}://;
6367                 }
6368                 if ($file ne $lastfile) {
6369                         $lastfile and print "</td></tr>\n";
6370                         if ($alternate++) {
6371                                 print "<tr class=\"dark\">\n";
6372                         } else {
6373                                 print "<tr class=\"light\">\n";
6374                         }
6375                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6376                                           file_name=>$file);
6377                         print "<td class=\"list\">".
6378                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6379                         print "</td><td>\n";
6380                         $lastfile = $file;
6381                 }
6382                 if ($binary) {
6383                         print "<div class=\"binary\">Binary file</div>\n";
6384                 } else {
6385                         $ltext = untabify($ltext);
6386                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6387                                 $ltext = esc_html($1, -nbsp=>1);
6388                                 $ltext .= '<span class="match">';
6389                                 $ltext .= esc_html($2, -nbsp=>1);
6390                                 $ltext .= '</span>';
6391                                 $ltext .= esc_html($3, -nbsp=>1);
6392                         } else {
6393                                 $ltext = esc_html($ltext, -nbsp=>1);
6394                         }
6395                         print "<div class=\"pre\">" .
6396                                 $cgi->a({-href => $file_href.'#l'.$lno,
6397                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6398                                 ' ' .  $ltext . "</div>\n";
6399                 }
6400         }
6401         if ($lastfile) {
6402                 print "</td></tr>\n";
6403                 if ($matches > 1000) {
6404                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6405                 }
6406         } else {
6407                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6408         }
6409         close $fd;
6410
6411         print "</table>\n";
6412
6413         git_footer_html();
6414 }
6415
6416 sub git_search_grep_body {
6417         my ($commitlist, $from, $to, $extra) = @_;
6418         $from = 0 unless defined $from;
6419         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6420
6421         print "<table class=\"commit_search\">\n";
6422         my $alternate = 1;
6423         for (my $i = $from; $i <= $to; $i++) {
6424                 my %co = %{$commitlist->[$i]};
6425                 if (!%co) {
6426                         next;
6427                 }
6428                 my $commit = $co{'id'};
6429                 if ($alternate) {
6430                         print "<tr class=\"dark\">\n";
6431                 } else {
6432                         print "<tr class=\"light\">\n";
6433                 }
6434                 $alternate ^= 1;
6435                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6436                       format_author_html('td', \%co, 15, 5) .
6437                       "<td>" .
6438                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6439                                -class => "list subject"},
6440                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6441                 my $comment = $co{'comment'};
6442                 foreach my $line (@$comment) {
6443                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6444                                 my ($lead, $match, $trail) = ($1, $2, $3);
6445                                 $match = chop_str($match, 70, 5, 'center');
6446                                 my $contextlen = int((80 - length($match))/2);
6447                                 $contextlen = 30 if ($contextlen > 30);
6448                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6449                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6450
6451                                 $lead  = esc_html($lead);
6452                                 $match = esc_html($match);
6453                                 $trail = esc_html($trail);
6454
6455                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6456                         }
6457                 }
6458                 print "</td>\n" .
6459                       "<td class=\"link\">" .
6460                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6461                       " | " .
6462                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6463                       " | " .
6464                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6465                 print "</td>\n" .
6466                       "</tr>\n";
6467         }
6468         if (defined $extra) {
6469                 print "<tr>\n" .
6470                       "<td colspan=\"3\">$extra</td>\n" .
6471                       "</tr>\n";
6472         }
6473         print "</table>\n";
6474 }
6475
6476 ## ======================================================================
6477 ## ======================================================================
6478 ## actions
6479
6480 sub git_project_list {
6481         my $order = $input_params{'order'};
6482         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6483                 die_error(400, "Unknown order parameter");
6484         }
6485
6486         my @list = git_get_projects_list($project_filter, $strict_export);
6487         if (!@list) {
6488                 die_error(404, "No projects found");
6489         }
6490
6491         git_header_html();
6492         if (defined $home_text && -f $home_text) {
6493                 print "<div class=\"index_include\">\n";
6494                 insert_file($home_text);
6495                 print "</div>\n";
6496         }
6497
6498         git_project_search_form($searchtext, $search_use_regexp);
6499         git_project_list_body(\@list, $order);
6500         git_footer_html();
6501 }
6502
6503 sub git_forks {
6504         my $order = $input_params{'order'};
6505         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6506                 die_error(400, "Unknown order parameter");
6507         }
6508
6509         my $filter = $project;
6510         $filter =~ s/\.git$//;
6511         my @list = git_get_projects_list($filter);
6512         if (!@list) {
6513                 die_error(404, "No forks found");
6514         }
6515
6516         git_header_html();
6517         git_print_page_nav('','');
6518         git_print_header_div('summary', "$project forks");
6519         git_project_list_body(\@list, $order);
6520         git_footer_html();
6521 }
6522
6523 sub git_project_index {
6524         my @projects = git_get_projects_list($project_filter, $strict_export);
6525         if (!@projects) {
6526                 die_error(404, "No projects found");
6527         }
6528
6529         print $cgi->header(
6530                 -type => 'text/plain',
6531                 -charset => 'utf-8',
6532                 -content_disposition => 'inline; filename="index.aux"');
6533
6534         foreach my $pr (@projects) {
6535                 if (!exists $pr->{'owner'}) {
6536                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6537                 }
6538
6539                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6540                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6541                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6542                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6543                 $path  =~ s/ /\+/g;
6544                 $owner =~ s/ /\+/g;
6545
6546                 print "$path $owner\n";
6547         }
6548 }
6549
6550 sub git_summary {
6551         my $descr = git_get_project_description($project) || "none";
6552         my %co = parse_commit("HEAD");
6553         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6554         my $head = $co{'id'};
6555         my $remote_heads = gitweb_check_feature('remote_heads');
6556
6557         my $owner = git_get_project_owner($project);
6558
6559         my $refs = git_get_references();
6560         # These get_*_list functions return one more to allow us to see if
6561         # there are more ...
6562         my @taglist  = git_get_tags_list(16);
6563         my @headlist = git_get_heads_list(16);
6564         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6565         my @forklist;
6566         my $check_forks = gitweb_check_feature('forks');
6567
6568         if ($check_forks) {
6569                 # find forks of a project
6570                 my $filter = $project;
6571                 $filter =~ s/\.git$//;
6572                 @forklist = git_get_projects_list($filter);
6573                 # filter out forks of forks
6574                 @forklist = filter_forks_from_projects_list(\@forklist)
6575                         if (@forklist);
6576         }
6577
6578         git_header_html();
6579         git_print_page_nav('summary','', $head);
6580
6581         print "<div class=\"title\">&nbsp;</div>\n";
6582         print "<table class=\"projects_list\">\n" .
6583               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6584         if ($owner and not $omit_owner) {
6585                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6586         }
6587         if (defined $cd{'rfc2822'}) {
6588                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6589                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6590         }
6591
6592         # use per project git URL list in $projectroot/$project/cloneurl
6593         # or make project git URL from git base URL and project name
6594         my $url_tag = "URL";
6595         my @url_list = git_get_project_url_list($project);
6596         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6597         foreach my $git_url (@url_list) {
6598                 next unless $git_url;
6599                 print format_repo_url($url_tag, $git_url);
6600                 $url_tag = "";
6601         }
6602
6603         # Tag cloud
6604         my $show_ctags = gitweb_check_feature('ctags');
6605         if ($show_ctags) {
6606                 my $ctags = git_get_project_ctags($project);
6607                 if (%$ctags) {
6608                         # without ability to add tags, don't show if there are none
6609                         my $cloud = git_populate_project_tagcloud($ctags);
6610                         print "<tr id=\"metadata_ctags\">" .
6611                               "<td>content tags</td>" .
6612                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6613                               "</tr>\n";
6614                 }
6615         }
6616
6617         print "</table>\n";
6618
6619         # If XSS prevention is on, we don't include README.html.
6620         # TODO: Allow a readme in some safe format.
6621         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6622                 print "<div class=\"title\">readme</div>\n" .
6623                       "<div class=\"readme\">\n";
6624                 insert_file("$projectroot/$project/README.html");
6625                 print "\n</div>\n"; # class="readme"
6626         }
6627
6628         # we need to request one more than 16 (0..15) to check if
6629         # those 16 are all
6630         my @commitlist = $head ? parse_commits($head, 17) : ();
6631         if (@commitlist) {
6632                 git_print_header_div('shortlog');
6633                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6634                                   $#commitlist <=  15 ? undef :
6635                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6636         }
6637
6638         if (@taglist) {
6639                 git_print_header_div('tags');
6640                 git_tags_body(\@taglist, 0, 15,
6641                               $#taglist <=  15 ? undef :
6642                               $cgi->a({-href => href(action=>"tags")}, "..."));
6643         }
6644
6645         if (@headlist) {
6646                 git_print_header_div('heads');
6647                 git_heads_body(\@headlist, $head, 0, 15,
6648                                $#headlist <= 15 ? undef :
6649                                $cgi->a({-href => href(action=>"heads")}, "..."));
6650         }
6651
6652         if (%remotedata) {
6653                 git_print_header_div('remotes');
6654                 git_remotes_body(\%remotedata, 15, $head);
6655         }
6656
6657         if (@forklist) {
6658                 git_print_header_div('forks');
6659                 git_project_list_body(\@forklist, 'age', 0, 15,
6660                                       $#forklist <= 15 ? undef :
6661                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6662                                       'no_header');
6663         }
6664
6665         git_footer_html();
6666 }
6667
6668 sub git_tag {
6669         my %tag = parse_tag($hash);
6670
6671         if (! %tag) {
6672                 die_error(404, "Unknown tag object");
6673         }
6674
6675         my $head = git_get_head_hash($project);
6676         git_header_html();
6677         git_print_page_nav('','', $head,undef,$head);
6678         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6679         print "<div class=\"title_text\">\n" .
6680               "<table class=\"object_header\">\n" .
6681               "<tr>\n" .
6682               "<td>object</td>\n" .
6683               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6684                                $tag{'object'}) . "</td>\n" .
6685               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6686                                               $tag{'type'}) . "</td>\n" .
6687               "</tr>\n";
6688         if (defined($tag{'author'})) {
6689                 git_print_authorship_rows(\%tag, 'author');
6690         }
6691         print "</table>\n\n" .
6692               "</div>\n";
6693         print "<div class=\"page_body\">";
6694         my $comment = $tag{'comment'};
6695         foreach my $line (@$comment) {
6696                 chomp $line;
6697                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6698         }
6699         print "</div>\n";
6700         git_footer_html();
6701 }
6702
6703 sub git_blame_common {
6704         my $format = shift || 'porcelain';
6705         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6706                 $format = 'incremental';
6707                 $action = 'blame_incremental'; # for page title etc
6708         }
6709
6710         # permissions
6711         gitweb_check_feature('blame')
6712                 or die_error(403, "Blame view not allowed");
6713
6714         # error checking
6715         die_error(400, "No file name given") unless $file_name;
6716         $hash_base ||= git_get_head_hash($project);
6717         die_error(404, "Couldn't find base commit") unless $hash_base;
6718         my %co = parse_commit($hash_base)
6719                 or die_error(404, "Commit not found");
6720         my $ftype = "blob";
6721         if (!defined $hash) {
6722                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6723                         or die_error(404, "Error looking up file");
6724         } else {
6725                 $ftype = git_get_type($hash);
6726                 if ($ftype !~ "blob") {
6727                         die_error(400, "Object is not a blob");
6728                 }
6729         }
6730
6731         my $fd;
6732         if ($format eq 'incremental') {
6733                 # get file contents (as base)
6734                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6735                         or die_error(500, "Open git-cat-file failed");
6736         } elsif ($format eq 'data') {
6737                 # run git-blame --incremental
6738                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6739                         $hash_base, "--", $file_name
6740                         or die_error(500, "Open git-blame --incremental failed");
6741         } else {
6742                 # run git-blame --porcelain
6743                 open $fd, "-|", git_cmd(), "blame", '-p',
6744                         $hash_base, '--', $file_name
6745                         or die_error(500, "Open git-blame --porcelain failed");
6746         }
6747         binmode $fd, ':utf8';
6748
6749         # incremental blame data returns early
6750         if ($format eq 'data') {
6751                 print $cgi->header(
6752                         -type=>"text/plain", -charset => "utf-8",
6753                         -status=> "200 OK");
6754                 local $| = 1; # output autoflush
6755                 while (my $line = <$fd>) {
6756                         print to_utf8($line);
6757                 }
6758                 close $fd
6759                         or print "ERROR $!\n";
6760
6761                 print 'END';
6762                 if (defined $t0 && gitweb_check_feature('timed')) {
6763                         print ' '.
6764                               tv_interval($t0, [ gettimeofday() ]).
6765                               ' '.$number_of_git_cmds;
6766                 }
6767                 print "\n";
6768
6769                 return;
6770         }
6771
6772         # page header
6773         git_header_html();
6774         my $formats_nav =
6775                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6776                         "blob") .
6777                 " | ";
6778         if ($format eq 'incremental') {
6779                 $formats_nav .=
6780                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6781                                 "blame") . " (non-incremental)";
6782         } else {
6783                 $formats_nav .=
6784                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6785                                 "blame") . " (incremental)";
6786         }
6787         $formats_nav .=
6788                 " | " .
6789                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6790                         "history") .
6791                 " | " .
6792                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6793                         "HEAD");
6794         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6795         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6796         git_print_page_path($file_name, $ftype, $hash_base);
6797
6798         # page body
6799         if ($format eq 'incremental') {
6800                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6801                       "This page requires JavaScript to run.\n Use ".
6802                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6803                               'this page').
6804                       " instead.\n".
6805                       "</b></center></div>\n</noscript>\n";
6806
6807                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6808         }
6809
6810         print qq!<div class="page_body">\n!;
6811         print qq!<div id="progress_info">... / ...</div>\n!
6812                 if ($format eq 'incremental');
6813         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6814               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6815               qq!<thead>\n!.
6816               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6817               qq!</thead>\n!.
6818               qq!<tbody>\n!;
6819
6820         my @rev_color = qw(light dark);
6821         my $num_colors = scalar(@rev_color);
6822         my $current_color = 0;
6823
6824         if ($format eq 'incremental') {
6825                 my $color_class = $rev_color[$current_color];
6826
6827                 #contents of a file
6828                 my $linenr = 0;
6829         LINE:
6830                 while (my $line = <$fd>) {
6831                         chomp $line;
6832                         $linenr++;
6833
6834                         print qq!<tr id="l$linenr" class="$color_class">!.
6835                               qq!<td class="sha1"><a href=""> </a></td>!.
6836                               qq!<td class="linenr">!.
6837                               qq!<a class="linenr" href="">$linenr</a></td>!;
6838                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6839                         print qq!</tr>\n!;
6840                 }
6841
6842         } else { # porcelain, i.e. ordinary blame
6843                 my %metainfo = (); # saves information about commits
6844
6845                 # blame data
6846         LINE:
6847                 while (my $line = <$fd>) {
6848                         chomp $line;
6849                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6850                         # no <lines in group> for subsequent lines in group of lines
6851                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6852                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6853                         if (!exists $metainfo{$full_rev}) {
6854                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6855                         }
6856                         my $meta = $metainfo{$full_rev};
6857                         my $data;
6858                         while ($data = <$fd>) {
6859                                 chomp $data;
6860                                 last if ($data =~ s/^\t//); # contents of line
6861                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6862                                         $meta->{$1} = $2 unless exists $meta->{$1};
6863                                 }
6864                                 if ($data =~ /^previous /) {
6865                                         $meta->{'nprevious'}++;
6866                                 }
6867                         }
6868                         my $short_rev = substr($full_rev, 0, 8);
6869                         my $author = $meta->{'author'};
6870                         my %date =
6871                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6872                         my $date = $date{'iso-tz'};
6873                         if ($group_size) {
6874                                 $current_color = ($current_color + 1) % $num_colors;
6875                         }
6876                         my $tr_class = $rev_color[$current_color];
6877                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6878                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6879                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6880                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6881                         if ($group_size) {
6882                                 print "<td class=\"sha1\"";
6883                                 print " title=\"". esc_html($author) . ", $date\"";
6884                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6885                                 print ">";
6886                                 print $cgi->a({-href => href(action=>"commit",
6887                                                              hash=>$full_rev,
6888                                                              file_name=>$file_name)},
6889                                               esc_html($short_rev));
6890                                 if ($group_size >= 2) {
6891                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6892                                         if (@author_initials) {
6893                                                 print "<br />" .
6894                                                       esc_html(join('', @author_initials));
6895                                                 #           or join('.', ...)
6896                                         }
6897                                 }
6898                                 print "</td>\n";
6899                         }
6900                         # 'previous' <sha1 of parent commit> <filename at commit>
6901                         if (exists $meta->{'previous'} &&
6902                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6903                                 $meta->{'parent'} = $1;
6904                                 $meta->{'file_parent'} = unquote($2);
6905                         }
6906                         my $linenr_commit =
6907                                 exists($meta->{'parent'}) ?
6908                                 $meta->{'parent'} : $full_rev;
6909                         my $linenr_filename =
6910                                 exists($meta->{'file_parent'}) ?
6911                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6912                         my $blamed = href(action => 'blame',
6913                                           file_name => $linenr_filename,
6914                                           hash_base => $linenr_commit);
6915                         print "<td class=\"linenr\">";
6916                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6917                                         -class => "linenr" },
6918                                       esc_html($lineno));
6919                         print "</td>";
6920                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6921                         print "</tr>\n";
6922                 } # end while
6923
6924         }
6925
6926         # footer
6927         print "</tbody>\n".
6928               "</table>\n"; # class="blame"
6929         print "</div>\n";   # class="blame_body"
6930         close $fd
6931                 or print "Reading blob failed\n";
6932
6933         git_footer_html();
6934 }
6935
6936 sub git_blame {
6937         git_blame_common();
6938 }
6939
6940 sub git_blame_incremental {
6941         git_blame_common('incremental');
6942 }
6943
6944 sub git_blame_data {
6945         git_blame_common('data');
6946 }
6947
6948 sub git_tags {
6949         my $head = git_get_head_hash($project);
6950         git_header_html();
6951         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6952         git_print_header_div('summary', $project);
6953
6954         my @tagslist = git_get_tags_list();
6955         if (@tagslist) {
6956                 git_tags_body(\@tagslist);
6957         }
6958         git_footer_html();
6959 }
6960
6961 sub git_heads {
6962         my $head = git_get_head_hash($project);
6963         git_header_html();
6964         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6965         git_print_header_div('summary', $project);
6966
6967         my @headslist = git_get_heads_list();
6968         if (@headslist) {
6969                 git_heads_body(\@headslist, $head);
6970         }
6971         git_footer_html();
6972 }
6973
6974 # used both for single remote view and for list of all the remotes
6975 sub git_remotes {
6976         gitweb_check_feature('remote_heads')
6977                 or die_error(403, "Remote heads view is disabled");
6978
6979         my $head = git_get_head_hash($project);
6980         my $remote = $input_params{'hash'};
6981
6982         my $remotedata = git_get_remotes_list($remote);
6983         die_error(500, "Unable to get remote information") unless defined $remotedata;
6984
6985         unless (%$remotedata) {
6986                 die_error(404, defined $remote ?
6987                         "Remote $remote not found" :
6988                         "No remotes found");
6989         }
6990
6991         git_header_html(undef, undef, -action_extra => $remote);
6992         git_print_page_nav('', '',  $head, undef, $head,
6993                 format_ref_views($remote ? '' : 'remotes'));
6994
6995         fill_remote_heads($remotedata);
6996         if (defined $remote) {
6997                 git_print_header_div('remotes', "$remote remote for $project");
6998                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6999         } else {
7000                 git_print_header_div('summary', "$project remotes");
7001                 git_remotes_body($remotedata, undef, $head);
7002         }
7003
7004         git_footer_html();
7005 }
7006
7007 sub git_blob_plain {
7008         my $type = shift;
7009         my $expires;
7010
7011         if (!defined $hash) {
7012                 if (defined $file_name) {
7013                         my $base = $hash_base || git_get_head_hash($project);
7014                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7015                                 or die_error(404, "Cannot find file");
7016                 } else {
7017                         die_error(400, "No file name defined");
7018                 }
7019         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7020                 # blobs defined by non-textual hash id's can be cached
7021                 $expires = "+1d";
7022         }
7023
7024         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7025                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7026
7027         # content-type (can include charset)
7028         $type = blob_contenttype($fd, $file_name, $type);
7029
7030         # "save as" filename, even when no $file_name is given
7031         my $save_as = "$hash";
7032         if (defined $file_name) {
7033                 $save_as = $file_name;
7034         } elsif ($type =~ m/^text\//) {
7035                 $save_as .= '.txt';
7036         }
7037
7038         # With XSS prevention on, blobs of all types except a few known safe
7039         # ones are served with "Content-Disposition: attachment" to make sure
7040         # they don't run in our security domain.  For certain image types,
7041         # blob view writes an <img> tag referring to blob_plain view, and we
7042         # want to be sure not to break that by serving the image as an
7043         # attachment (though Firefox 3 doesn't seem to care).
7044         my $sandbox = $prevent_xss &&
7045                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7046
7047         # serve text/* as text/plain
7048         if ($prevent_xss &&
7049             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7050              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7051                 my $rest = $1;
7052                 $rest = defined $rest ? $rest : '';
7053                 $type = "text/plain$rest";
7054         }
7055
7056         print $cgi->header(
7057                 -type => $type,
7058                 -expires => $expires,
7059                 -content_disposition =>
7060                         ($sandbox ? 'attachment' : 'inline')
7061                         . '; filename="' . $save_as . '"');
7062         local $/ = undef;
7063         binmode STDOUT, ':raw';
7064         print <$fd>;
7065         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7066         close $fd;
7067 }
7068
7069 sub git_blob {
7070         my $expires;
7071
7072         if (!defined $hash) {
7073                 if (defined $file_name) {
7074                         my $base = $hash_base || git_get_head_hash($project);
7075                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7076                                 or die_error(404, "Cannot find file");
7077                 } else {
7078                         die_error(400, "No file name defined");
7079                 }
7080         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7081                 # blobs defined by non-textual hash id's can be cached
7082                 $expires = "+1d";
7083         }
7084
7085         my $have_blame = gitweb_check_feature('blame');
7086         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7087                 or die_error(500, "Couldn't cat $file_name, $hash");
7088         my $mimetype = blob_mimetype($fd, $file_name);
7089         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7090         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7091                 close $fd;
7092                 return git_blob_plain($mimetype);
7093         }
7094         # we can have blame only for text/* mimetype
7095         $have_blame &&= ($mimetype =~ m!^text/!);
7096
7097         my $highlight = gitweb_check_feature('highlight');
7098         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7099         $fd = run_highlighter($fd, $highlight, $syntax)
7100                 if $syntax;
7101
7102         git_header_html(undef, $expires);
7103         my $formats_nav = '';
7104         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7105                 if (defined $file_name) {
7106                         if ($have_blame) {
7107                                 $formats_nav .=
7108                                         $cgi->a({-href => href(action=>"blame", -replay=>1),
7109                                                 -class => "blamelink"},
7110                                                 "blame") .
7111                                         " | ";
7112                         }
7113                         $formats_nav .=
7114                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7115                                         "history") .
7116                                 " | " .
7117                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7118                                         "raw") .
7119                                 " | " .
7120                                 $cgi->a({-href => href(action=>"blob",
7121                                                        hash_base=>"HEAD", file_name=>$file_name)},
7122                                         "HEAD");
7123                 } else {
7124                         $formats_nav .=
7125                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7126                                         "raw");
7127                 }
7128                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7129                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7130         } else {
7131                 print "<div class=\"page_nav\">\n" .
7132                       "<br/><br/></div>\n" .
7133                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7134         }
7135         git_print_page_path($file_name, "blob", $hash_base);
7136         print "<div class=\"page_body\">\n";
7137         if ($mimetype =~ m!^image/!) {
7138                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7139                 if ($file_name) {
7140                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7141                 }
7142                 print qq! src="! .
7143                       href(action=>"blob_plain", hash=>$hash,
7144                            hash_base=>$hash_base, file_name=>$file_name) .
7145                       qq!" />\n!;
7146         } else {
7147                 my $nr;
7148                 while (my $line = <$fd>) {
7149                         chomp $line;
7150                         $nr++;
7151                         $line = untabify($line);
7152                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7153                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7154                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7155                 }
7156         }
7157         close $fd
7158                 or print "Reading blob failed.\n";
7159         print "</div>";
7160         git_footer_html();
7161 }
7162
7163 sub git_tree {
7164         if (!defined $hash_base) {
7165                 $hash_base = "HEAD";
7166         }
7167         if (!defined $hash) {
7168                 if (defined $file_name) {
7169                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7170                 } else {
7171                         $hash = $hash_base;
7172                 }
7173         }
7174         die_error(404, "No such tree") unless defined($hash);
7175
7176         my $show_sizes = gitweb_check_feature('show-sizes');
7177         my $have_blame = gitweb_check_feature('blame');
7178
7179         my @entries = ();
7180         {
7181                 local $/ = "\0";
7182                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7183                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7184                         or die_error(500, "Open git-ls-tree failed");
7185                 @entries = map { chomp; $_ } <$fd>;
7186                 close $fd
7187                         or die_error(404, "Reading tree failed");
7188         }
7189
7190         my $refs = git_get_references();
7191         my $ref = format_ref_marker($refs, $hash_base);
7192         git_header_html();
7193         my $basedir = '';
7194         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7195                 my @views_nav = ();
7196                 if (defined $file_name) {
7197                         push @views_nav,
7198                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7199                                         "history"),
7200                                 $cgi->a({-href => href(action=>"tree",
7201                                                        hash_base=>"HEAD", file_name=>$file_name)},
7202                                         "HEAD"),
7203                 }
7204                 my $snapshot_links = format_snapshot_links($hash);
7205                 if (defined $snapshot_links) {
7206                         # FIXME: Should be available when we have no hash base as well.
7207                         push @views_nav, $snapshot_links;
7208                 }
7209                 git_print_page_nav('tree','', $hash_base, undef, undef,
7210                                    join(' | ', @views_nav));
7211                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7212         } else {
7213                 undef $hash_base;
7214                 print "<div class=\"page_nav\">\n";
7215                 print "<br/><br/></div>\n";
7216                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7217         }
7218         if (defined $file_name) {
7219                 $basedir = $file_name;
7220                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7221                         $basedir .= '/';
7222                 }
7223                 git_print_page_path($file_name, 'tree', $hash_base);
7224         }
7225         print "<div class=\"page_body\">\n";
7226         print "<table class=\"tree\">\n";
7227         my $alternate = 1;
7228         # '..' (top directory) link if possible
7229         if (defined $hash_base &&
7230             defined $file_name && $file_name =~ m![^/]+$!) {
7231                 if ($alternate) {
7232                         print "<tr class=\"dark\">\n";
7233                 } else {
7234                         print "<tr class=\"light\">\n";
7235                 }
7236                 $alternate ^= 1;
7237
7238                 my $up = $file_name;
7239                 $up =~ s!/?[^/]+$!!;
7240                 undef $up unless $up;
7241                 # based on git_print_tree_entry
7242                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7243                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7244                 print '<td class="list">';
7245                 print $cgi->a({-href => href(action=>"tree",
7246                                              hash_base=>$hash_base,
7247                                              file_name=>$up)},
7248                               "..");
7249                 print "</td>\n";
7250                 print "<td class=\"link\"></td>\n";
7251
7252                 print "</tr>\n";
7253         }
7254         foreach my $line (@entries) {
7255                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7256
7257                 if ($alternate) {
7258                         print "<tr class=\"dark\">\n";
7259                 } else {
7260                         print "<tr class=\"light\">\n";
7261                 }
7262                 $alternate ^= 1;
7263
7264                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7265
7266                 print "</tr>\n";
7267         }
7268         print "</table>\n" .
7269               "</div>";
7270         git_footer_html();
7271 }
7272
7273 sub sanitize_for_filename {
7274     my $name = shift;
7275
7276     $name =~ s!/!-!g;
7277     $name =~ s/[^[:alnum:]_.-]//g;
7278
7279     return $name;
7280 }
7281
7282 sub snapshot_name {
7283         my ($project, $hash) = @_;
7284
7285         # path/to/project.git  -> project
7286         # path/to/project/.git -> project
7287         my $name = to_utf8($project);
7288         $name =~ s,([^/])/*\.git$,$1,;
7289         $name = sanitize_for_filename(basename($name));
7290
7291         my $ver = $hash;
7292         if ($hash =~ /^[0-9a-fA-F]+$/) {
7293                 # shorten SHA-1 hash
7294                 my $full_hash = git_get_full_hash($project, $hash);
7295                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7296                         $ver = git_get_short_hash($project, $hash);
7297                 }
7298         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7299                 # tags don't need shortened SHA-1 hash
7300                 $ver = $1;
7301         } else {
7302                 # branches and other need shortened SHA-1 hash
7303                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7304                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7305                         my $ref_dir = (defined $1) ? $1 : '';
7306                         $ver = $2;
7307
7308                         $ref_dir = sanitize_for_filename($ref_dir);
7309                         # for refs neither in heads nor remotes we want to
7310                         # add a ref dir to archive name
7311                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7312                                 $ver = $ref_dir . '-' . $ver;
7313                         }
7314                 }
7315                 $ver .= '-' . git_get_short_hash($project, $hash);
7316         }
7317         # special case of sanitization for filename - we change
7318         # slashes to dots instead of dashes
7319         # in case of hierarchical branch names
7320         $ver =~ s!/!.!g;
7321         $ver =~ s/[^[:alnum:]_.-]//g;
7322
7323         # name = project-version_string
7324         $name = "$name-$ver";
7325
7326         return wantarray ? ($name, $name) : $name;
7327 }
7328
7329 sub exit_if_unmodified_since {
7330         my ($latest_epoch) = @_;
7331         our $cgi;
7332
7333         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7334         if (defined $if_modified) {
7335                 my $since;
7336                 if (eval { require HTTP::Date; 1; }) {
7337                         $since = HTTP::Date::str2time($if_modified);
7338                 } elsif (eval { require Time::ParseDate; 1; }) {
7339                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7340                 }
7341                 if (defined $since && $latest_epoch <= $since) {
7342                         my %latest_date = parse_date($latest_epoch);
7343                         print $cgi->header(
7344                                 -last_modified => $latest_date{'rfc2822'},
7345                                 -status => '304 Not Modified');
7346                         goto DONE_GITWEB;
7347                 }
7348         }
7349 }
7350
7351 sub git_snapshot {
7352         my $format = $input_params{'snapshot_format'};
7353         if (!@snapshot_fmts) {
7354                 die_error(403, "Snapshots not allowed");
7355         }
7356         # default to first supported snapshot format
7357         $format ||= $snapshot_fmts[0];
7358         if ($format !~ m/^[a-z0-9]+$/) {
7359                 die_error(400, "Invalid snapshot format parameter");
7360         } elsif (!exists($known_snapshot_formats{$format})) {
7361                 die_error(400, "Unknown snapshot format");
7362         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7363                 die_error(403, "Snapshot format not allowed");
7364         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7365                 die_error(403, "Unsupported snapshot format");
7366         }
7367
7368         my $type = git_get_type("$hash^{}");
7369         if (!$type) {
7370                 die_error(404, 'Object does not exist');
7371         }  elsif ($type eq 'blob') {
7372                 die_error(400, 'Object is not a tree-ish');
7373         }
7374
7375         my ($name, $prefix) = snapshot_name($project, $hash);
7376         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7377
7378         my %co = parse_commit($hash);
7379         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7380
7381         my $cmd = quote_command(
7382                 git_cmd(), 'archive',
7383                 "--format=$known_snapshot_formats{$format}{'format'}",
7384                 "--prefix=$prefix/", $hash);
7385         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7386                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7387         }
7388
7389         $filename =~ s/(["\\])/\\$1/g;
7390         my %latest_date;
7391         if (%co) {
7392                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7393         }
7394
7395         print $cgi->header(
7396                 -type => $known_snapshot_formats{$format}{'type'},
7397                 -content_disposition => 'inline; filename="' . $filename . '"',
7398                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7399                 -status => '200 OK');
7400
7401         open my $fd, "-|", $cmd
7402                 or die_error(500, "Execute git-archive failed");
7403         binmode STDOUT, ':raw';
7404         print <$fd>;
7405         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7406         close $fd;
7407 }
7408
7409 sub git_log_generic {
7410         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7411
7412         my $head = git_get_head_hash($project);
7413         if (!defined $base) {
7414                 $base = $head;
7415         }
7416         if (!defined $page) {
7417                 $page = 0;
7418         }
7419         my $refs = git_get_references();
7420
7421         my $commit_hash = $base;
7422         if (defined $parent) {
7423                 $commit_hash = "$parent..$base";
7424         }
7425         my @commitlist =
7426                 parse_commits($commit_hash, 101, (100 * $page),
7427                               defined $file_name ? ($file_name, "--full-history") : ());
7428
7429         my $ftype;
7430         if (!defined $file_hash && defined $file_name) {
7431                 # some commits could have deleted file in question,
7432                 # and not have it in tree, but one of them has to have it
7433                 for (my $i = 0; $i < @commitlist; $i++) {
7434                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7435                         last if defined $file_hash;
7436                 }
7437         }
7438         if (defined $file_hash) {
7439                 $ftype = git_get_type($file_hash);
7440         }
7441         if (defined $file_name && !defined $ftype) {
7442                 die_error(500, "Unknown type of object");
7443         }
7444         my %co;
7445         if (defined $file_name) {
7446                 %co = parse_commit($base)
7447                         or die_error(404, "Unknown commit object");
7448         }
7449
7450
7451         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7452         my $next_link = '';
7453         if ($#commitlist >= 100) {
7454                 $next_link =
7455                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7456                                  -accesskey => "n", -title => "Alt-n"}, "next");
7457         }
7458         my $patch_max = gitweb_get_feature('patches');
7459         if ($patch_max && !defined $file_name) {
7460                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7461                         $paging_nav .= " &sdot; " .
7462                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7463                                         "patches");
7464                 }
7465         }
7466
7467         git_header_html();
7468         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7469         if (defined $file_name) {
7470                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7471         } else {
7472                 git_print_header_div('summary', $project)
7473         }
7474         git_print_page_path($file_name, $ftype, $hash_base)
7475                 if (defined $file_name);
7476
7477         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7478                      $file_name, $file_hash, $ftype);
7479
7480         git_footer_html();
7481 }
7482
7483 sub git_log {
7484         git_log_generic('log', \&git_log_body,
7485                         $hash, $hash_parent);
7486 }
7487
7488 sub git_commit {
7489         $hash ||= $hash_base || "HEAD";
7490         my %co = parse_commit($hash)
7491             or die_error(404, "Unknown commit object");
7492
7493         my $parent  = $co{'parent'};
7494         my $parents = $co{'parents'}; # listref
7495
7496         # we need to prepare $formats_nav before any parameter munging
7497         my $formats_nav;
7498         if (!defined $parent) {
7499                 # --root commitdiff
7500                 $formats_nav .= '(initial)';
7501         } elsif (@$parents == 1) {
7502                 # single parent commit
7503                 $formats_nav .=
7504                         '(parent: ' .
7505                         $cgi->a({-href => href(action=>"commit",
7506                                                hash=>$parent)},
7507                                 esc_html(substr($parent, 0, 7))) .
7508                         ')';
7509         } else {
7510                 # merge commit
7511                 $formats_nav .=
7512                         '(merge: ' .
7513                         join(' ', map {
7514                                 $cgi->a({-href => href(action=>"commit",
7515                                                        hash=>$_)},
7516                                         esc_html(substr($_, 0, 7)));
7517                         } @$parents ) .
7518                         ')';
7519         }
7520         if (gitweb_check_feature('patches') && @$parents <= 1) {
7521                 $formats_nav .= " | " .
7522                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7523                                 "patch");
7524         }
7525
7526         if (!defined $parent) {
7527                 $parent = "--root";
7528         }
7529         my @difftree;
7530         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7531                 @diff_opts,
7532                 (@$parents <= 1 ? $parent : '-c'),
7533                 $hash, "--"
7534                 or die_error(500, "Open git-diff-tree failed");
7535         @difftree = map { chomp; $_ } <$fd>;
7536         close $fd or die_error(404, "Reading git-diff-tree failed");
7537
7538         # non-textual hash id's can be cached
7539         my $expires;
7540         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7541                 $expires = "+1d";
7542         }
7543         my $refs = git_get_references();
7544         my $ref = format_ref_marker($refs, $co{'id'});
7545
7546         git_header_html(undef, $expires);
7547         git_print_page_nav('commit', '',
7548                            $hash, $co{'tree'}, $hash,
7549                            $formats_nav);
7550
7551         if (defined $co{'parent'}) {
7552                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7553         } else {
7554                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7555         }
7556         print "<div class=\"title_text\">\n" .
7557               "<table class=\"object_header\">\n";
7558         git_print_authorship_rows(\%co);
7559         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7560         print "<tr>" .
7561               "<td>tree</td>" .
7562               "<td class=\"sha1\">" .
7563               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7564                        class => "list"}, $co{'tree'}) .
7565               "</td>" .
7566               "<td class=\"link\">" .
7567               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7568                       "tree");
7569         my $snapshot_links = format_snapshot_links($hash);
7570         if (defined $snapshot_links) {
7571                 print " | " . $snapshot_links;
7572         }
7573         print "</td>" .
7574               "</tr>\n";
7575
7576         foreach my $par (@$parents) {
7577                 print "<tr>" .
7578                       "<td>parent</td>" .
7579                       "<td class=\"sha1\">" .
7580                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7581                                class => "list"}, $par) .
7582                       "</td>" .
7583                       "<td class=\"link\">" .
7584                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7585                       " | " .
7586                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7587                       "</td>" .
7588                       "</tr>\n";
7589         }
7590         print "</table>".
7591               "</div>\n";
7592
7593         print "<div class=\"page_body\">\n";
7594         git_print_log($co{'comment'});
7595         print "</div>\n";
7596
7597         git_difftree_body(\@difftree, $hash, @$parents);
7598
7599         git_footer_html();
7600 }
7601
7602 sub git_object {
7603         # object is defined by:
7604         # - hash or hash_base alone
7605         # - hash_base and file_name
7606         my $type;
7607
7608         # - hash or hash_base alone
7609         if ($hash || ($hash_base && !defined $file_name)) {
7610                 my $object_id = $hash || $hash_base;
7611
7612                 open my $fd, "-|", quote_command(
7613                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7614                         or die_error(404, "Object does not exist");
7615                 $type = <$fd>;
7616                 defined $type && chomp $type;
7617                 close $fd
7618                         or die_error(404, "Object does not exist");
7619
7620         # - hash_base and file_name
7621         } elsif ($hash_base && defined $file_name) {
7622                 $file_name =~ s,/+$,,;
7623
7624                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7625                         or die_error(404, "Base object does not exist");
7626
7627                 # here errors should not happen
7628                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7629                         or die_error(500, "Open git-ls-tree failed");
7630                 my $line = <$fd>;
7631                 close $fd;
7632
7633                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7634                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7635                         die_error(404, "File or directory for given base does not exist");
7636                 }
7637                 $type = $2;
7638                 $hash = $3;
7639         } else {
7640                 die_error(400, "Not enough information to find object");
7641         }
7642
7643         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7644                                           hash=>$hash, hash_base=>$hash_base,
7645                                           file_name=>$file_name),
7646                              -status => '302 Found');
7647 }
7648
7649 sub git_blobdiff {
7650         my $format = shift || 'html';
7651         my $diff_style = $input_params{'diff_style'} || 'inline';
7652
7653         my $fd;
7654         my @difftree;
7655         my %diffinfo;
7656         my $expires;
7657
7658         # preparing $fd and %diffinfo for git_patchset_body
7659         # new style URI
7660         if (defined $hash_base && defined $hash_parent_base) {
7661                 if (defined $file_name) {
7662                         # read raw output
7663                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7664                                 $hash_parent_base, $hash_base,
7665                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7666                                 or die_error(500, "Open git-diff-tree failed");
7667                         @difftree = map { chomp; $_ } <$fd>;
7668                         close $fd
7669                                 or die_error(404, "Reading git-diff-tree failed");
7670                         @difftree
7671                                 or die_error(404, "Blob diff not found");
7672
7673                 } elsif (defined $hash &&
7674                          $hash =~ /[0-9a-fA-F]{40}/) {
7675                         # try to find filename from $hash
7676
7677                         # read filtered raw output
7678                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7679                                 $hash_parent_base, $hash_base, "--"
7680                                 or die_error(500, "Open git-diff-tree failed");
7681                         @difftree =
7682                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7683                                 # $hash == to_id
7684                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7685                                 map { chomp; $_ } <$fd>;
7686                         close $fd
7687                                 or die_error(404, "Reading git-diff-tree failed");
7688                         @difftree
7689                                 or die_error(404, "Blob diff not found");
7690
7691                 } else {
7692                         die_error(400, "Missing one of the blob diff parameters");
7693                 }
7694
7695                 if (@difftree > 1) {
7696                         die_error(400, "Ambiguous blob diff specification");
7697                 }
7698
7699                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7700                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7701                 $file_name   ||= $diffinfo{'to_file'};
7702
7703                 $hash_parent ||= $diffinfo{'from_id'};
7704                 $hash        ||= $diffinfo{'to_id'};
7705
7706                 # non-textual hash id's can be cached
7707                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7708                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7709                         $expires = '+1d';
7710                 }
7711
7712                 # open patch output
7713                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7714                         '-p', ($format eq 'html' ? "--full-index" : ()),
7715                         $hash_parent_base, $hash_base,
7716                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7717                         or die_error(500, "Open git-diff-tree failed");
7718         }
7719
7720         # old/legacy style URI -- not generated anymore since 1.4.3.
7721         if (!%diffinfo) {
7722                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7723         }
7724
7725         # header
7726         if ($format eq 'html') {
7727                 my $formats_nav =
7728                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7729                                 "raw");
7730                 $formats_nav .= diff_style_nav($diff_style);
7731                 git_header_html(undef, $expires);
7732                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7733                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7734                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7735                 } else {
7736                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7737                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7738                 }
7739                 if (defined $file_name) {
7740                         git_print_page_path($file_name, "blob", $hash_base);
7741                 } else {
7742                         print "<div class=\"page_path\"></div>\n";
7743                 }
7744
7745         } elsif ($format eq 'plain') {
7746                 print $cgi->header(
7747                         -type => 'text/plain',
7748                         -charset => 'utf-8',
7749                         -expires => $expires,
7750                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7751
7752                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7753
7754         } else {
7755                 die_error(400, "Unknown blobdiff format");
7756         }
7757
7758         # patch
7759         if ($format eq 'html') {
7760                 print "<div class=\"page_body\">\n";
7761
7762                 git_patchset_body($fd, $diff_style,
7763                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7764                 close $fd;
7765
7766                 print "</div>\n"; # class="page_body"
7767                 git_footer_html();
7768
7769         } else {
7770                 while (my $line = <$fd>) {
7771                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7772                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7773
7774                         print $line;
7775
7776                         last if $line =~ m!^\+\+\+!;
7777                 }
7778                 local $/ = undef;
7779                 print <$fd>;
7780                 close $fd;
7781         }
7782 }
7783
7784 sub git_blobdiff_plain {
7785         git_blobdiff('plain');
7786 }
7787
7788 # assumes that it is added as later part of already existing navigation,
7789 # so it returns "| foo | bar" rather than just "foo | bar"
7790 sub diff_style_nav {
7791         my ($diff_style, $is_combined) = @_;
7792         $diff_style ||= 'inline';
7793
7794         return "" if ($is_combined);
7795
7796         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7797         my %styles = @styles;
7798         @styles =
7799                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7800
7801         return join '',
7802                 map { " | ".$_ }
7803                 map {
7804                         $_ eq $diff_style ? $styles{$_} :
7805                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7806                 } @styles;
7807 }
7808
7809 sub git_commitdiff {
7810         my %params = @_;
7811         my $format = $params{-format} || 'html';
7812         my $diff_style = $input_params{'diff_style'} || 'inline';
7813
7814         my ($patch_max) = gitweb_get_feature('patches');
7815         if ($format eq 'patch') {
7816                 die_error(403, "Patch view not allowed") unless $patch_max;
7817         }
7818
7819         $hash ||= $hash_base || "HEAD";
7820         my %co = parse_commit($hash)
7821             or die_error(404, "Unknown commit object");
7822
7823         # choose format for commitdiff for merge
7824         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7825                 $hash_parent = '--cc';
7826         }
7827         # we need to prepare $formats_nav before almost any parameter munging
7828         my $formats_nav;
7829         if ($format eq 'html') {
7830                 $formats_nav =
7831                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7832                                 "raw");
7833                 if ($patch_max && @{$co{'parents'}} <= 1) {
7834                         $formats_nav .= " | " .
7835                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7836                                         "patch");
7837                 }
7838                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7839
7840                 if (defined $hash_parent &&
7841                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7842                         # commitdiff with two commits given
7843                         my $hash_parent_short = $hash_parent;
7844                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7845                                 $hash_parent_short = substr($hash_parent, 0, 7);
7846                         }
7847                         $formats_nav .=
7848                                 ' (from';
7849                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7850                                 if ($co{'parents'}[$i] eq $hash_parent) {
7851                                         $formats_nav .= ' parent ' . ($i+1);
7852                                         last;
7853                                 }
7854                         }
7855                         $formats_nav .= ': ' .
7856                                 $cgi->a({-href => href(-replay=>1,
7857                                                        hash=>$hash_parent, hash_base=>undef)},
7858                                         esc_html($hash_parent_short)) .
7859                                 ')';
7860                 } elsif (!$co{'parent'}) {
7861                         # --root commitdiff
7862                         $formats_nav .= ' (initial)';
7863                 } elsif (scalar @{$co{'parents'}} == 1) {
7864                         # single parent commit
7865                         $formats_nav .=
7866                                 ' (parent: ' .
7867                                 $cgi->a({-href => href(-replay=>1,
7868                                                        hash=>$co{'parent'}, hash_base=>undef)},
7869                                         esc_html(substr($co{'parent'}, 0, 7))) .
7870                                 ')';
7871                 } else {
7872                         # merge commit
7873                         if ($hash_parent eq '--cc') {
7874                                 $formats_nav .= ' | ' .
7875                                         $cgi->a({-href => href(-replay=>1,
7876                                                                hash=>$hash, hash_parent=>'-c')},
7877                                                 'combined');
7878                         } else { # $hash_parent eq '-c'
7879                                 $formats_nav .= ' | ' .
7880                                         $cgi->a({-href => href(-replay=>1,
7881                                                                hash=>$hash, hash_parent=>'--cc')},
7882                                                 'compact');
7883                         }
7884                         $formats_nav .=
7885                                 ' (merge: ' .
7886                                 join(' ', map {
7887                                         $cgi->a({-href => href(-replay=>1,
7888                                                                hash=>$_, hash_base=>undef)},
7889                                                 esc_html(substr($_, 0, 7)));
7890                                 } @{$co{'parents'}} ) .
7891                                 ')';
7892                 }
7893         }
7894
7895         my $hash_parent_param = $hash_parent;
7896         if (!defined $hash_parent_param) {
7897                 # --cc for multiple parents, --root for parentless
7898                 $hash_parent_param =
7899                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7900         }
7901
7902         # read commitdiff
7903         my $fd;
7904         my @difftree;
7905         if ($format eq 'html') {
7906                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7907                         "--no-commit-id", "--patch-with-raw", "--full-index",
7908                         $hash_parent_param, $hash, "--"
7909                         or die_error(500, "Open git-diff-tree failed");
7910
7911                 while (my $line = <$fd>) {
7912                         chomp $line;
7913                         # empty line ends raw part of diff-tree output
7914                         last unless $line;
7915                         push @difftree, scalar parse_difftree_raw_line($line);
7916                 }
7917
7918         } elsif ($format eq 'plain') {
7919                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7920                         '-p', $hash_parent_param, $hash, "--"
7921                         or die_error(500, "Open git-diff-tree failed");
7922         } elsif ($format eq 'patch') {
7923                 # For commit ranges, we limit the output to the number of
7924                 # patches specified in the 'patches' feature.
7925                 # For single commits, we limit the output to a single patch,
7926                 # diverging from the git-format-patch default.
7927                 my @commit_spec = ();
7928                 if ($hash_parent) {
7929                         if ($patch_max > 0) {
7930                                 push @commit_spec, "-$patch_max";
7931                         }
7932                         push @commit_spec, '-n', "$hash_parent..$hash";
7933                 } else {
7934                         if ($params{-single}) {
7935                                 push @commit_spec, '-1';
7936                         } else {
7937                                 if ($patch_max > 0) {
7938                                         push @commit_spec, "-$patch_max";
7939                                 }
7940                                 push @commit_spec, "-n";
7941                         }
7942                         push @commit_spec, '--root', $hash;
7943                 }
7944                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7945                         '--encoding=utf8', '--stdout', @commit_spec
7946                         or die_error(500, "Open git-format-patch failed");
7947         } else {
7948                 die_error(400, "Unknown commitdiff format");
7949         }
7950
7951         # non-textual hash id's can be cached
7952         my $expires;
7953         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7954                 $expires = "+1d";
7955         }
7956
7957         # write commit message
7958         if ($format eq 'html') {
7959                 my $refs = git_get_references();
7960                 my $ref = format_ref_marker($refs, $co{'id'});
7961
7962                 git_header_html(undef, $expires);
7963                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7964                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7965                 print "<div class=\"title_text\">\n" .
7966                       "<table class=\"object_header\">\n";
7967                 git_print_authorship_rows(\%co);
7968                 print "</table>".
7969                       "</div>\n";
7970                 print "<div class=\"page_body\">\n";
7971                 if (@{$co{'comment'}} > 1) {
7972                         print "<div class=\"log\">\n";
7973                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7974                         print "</div>\n"; # class="log"
7975                 }
7976
7977         } elsif ($format eq 'plain') {
7978                 my $refs = git_get_references("tags");
7979                 my $tagname = git_get_rev_name_tags($hash);
7980                 my $filename = basename($project) . "-$hash.patch";
7981
7982                 print $cgi->header(
7983                         -type => 'text/plain',
7984                         -charset => 'utf-8',
7985                         -expires => $expires,
7986                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7987                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7988                 print "From: " . to_utf8($co{'author'}) . "\n";
7989                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7990                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7991
7992                 print "X-Git-Tag: $tagname\n" if $tagname;
7993                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7994
7995                 foreach my $line (@{$co{'comment'}}) {
7996                         print to_utf8($line) . "\n";
7997                 }
7998                 print "---\n\n";
7999         } elsif ($format eq 'patch') {
8000                 my $filename = basename($project) . "-$hash.patch";
8001
8002                 print $cgi->header(
8003                         -type => 'text/plain',
8004                         -charset => 'utf-8',
8005                         -expires => $expires,
8006                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8007         }
8008
8009         # write patch
8010         if ($format eq 'html') {
8011                 my $use_parents = !defined $hash_parent ||
8012                         $hash_parent eq '-c' || $hash_parent eq '--cc';
8013                 git_difftree_body(\@difftree, $hash,
8014                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8015                 print "<br/>\n";
8016
8017                 git_patchset_body($fd, $diff_style,
8018                                   \@difftree, $hash,
8019                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8020                 close $fd;
8021                 print "</div>\n"; # class="page_body"
8022                 git_footer_html();
8023
8024         } elsif ($format eq 'plain') {
8025                 local $/ = undef;
8026                 print <$fd>;
8027                 close $fd
8028                         or print "Reading git-diff-tree failed\n";
8029         } elsif ($format eq 'patch') {
8030                 local $/ = undef;
8031                 print <$fd>;
8032                 close $fd
8033                         or print "Reading git-format-patch failed\n";
8034         }
8035 }
8036
8037 sub git_commitdiff_plain {
8038         git_commitdiff(-format => 'plain');
8039 }
8040
8041 # format-patch-style patches
8042 sub git_patch {
8043         git_commitdiff(-format => 'patch', -single => 1);
8044 }
8045
8046 sub git_patches {
8047         git_commitdiff(-format => 'patch');
8048 }
8049
8050 sub git_history {
8051         git_log_generic('history', \&git_history_body,
8052                         $hash_base, $hash_parent_base,
8053                         $file_name, $hash);
8054 }
8055
8056 sub git_search {
8057         $searchtype ||= 'commit';
8058
8059         # check if appropriate features are enabled
8060         gitweb_check_feature('search')
8061                 or die_error(403, "Search is disabled");
8062         if ($searchtype eq 'pickaxe') {
8063                 # pickaxe may take all resources of your box and run for several minutes
8064                 # with every query - so decide by yourself how public you make this feature
8065                 gitweb_check_feature('pickaxe')
8066                         or die_error(403, "Pickaxe search is disabled");
8067         }
8068         if ($searchtype eq 'grep') {
8069                 # grep search might be potentially CPU-intensive, too
8070                 gitweb_check_feature('grep')
8071                         or die_error(403, "Grep search is disabled");
8072         }
8073
8074         if (!defined $searchtext) {
8075                 die_error(400, "Text field is empty");
8076         }
8077         if (!defined $hash) {
8078                 $hash = git_get_head_hash($project);
8079         }
8080         my %co = parse_commit($hash);
8081         if (!%co) {
8082                 die_error(404, "Unknown commit object");
8083         }
8084         if (!defined $page) {
8085                 $page = 0;
8086         }
8087
8088         if ($searchtype eq 'commit' ||
8089             $searchtype eq 'author' ||
8090             $searchtype eq 'committer') {
8091                 git_search_message(%co);
8092         } elsif ($searchtype eq 'pickaxe') {
8093                 git_search_changes(%co);
8094         } elsif ($searchtype eq 'grep') {
8095                 git_search_files(%co);
8096         } else {
8097                 die_error(400, "Unknown search type");
8098         }
8099 }
8100
8101 sub git_search_help {
8102         git_header_html();
8103         git_print_page_nav('','', $hash,$hash,$hash);
8104         print <<EOT;
8105 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8106 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8107 the pattern entered is recognized as the POSIX extended
8108 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8109 insensitive).</p>
8110 <dl>
8111 <dt><b>commit</b></dt>
8112 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8113 EOT
8114         my $have_grep = gitweb_check_feature('grep');
8115         if ($have_grep) {
8116                 print <<EOT;
8117 <dt><b>grep</b></dt>
8118 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8119     a different one) are searched for the given pattern. On large trees, this search can take
8120 a while and put some strain on the server, so please use it with some consideration. Note that
8121 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8122 case-sensitive.</dd>
8123 EOT
8124         }
8125         print <<EOT;
8126 <dt><b>author</b></dt>
8127 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8128 <dt><b>committer</b></dt>
8129 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8130 EOT
8131         my $have_pickaxe = gitweb_check_feature('pickaxe');
8132         if ($have_pickaxe) {
8133                 print <<EOT;
8134 <dt><b>pickaxe</b></dt>
8135 <dd>All commits that caused the string to appear or disappear from any file (changes that
8136 added, removed or "modified" the string) will be listed. This search can take a while and
8137 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8138 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8139 EOT
8140         }
8141         print "</dl>\n";
8142         git_footer_html();
8143 }
8144
8145 sub git_shortlog {
8146         git_log_generic('shortlog', \&git_shortlog_body,
8147                         $hash, $hash_parent);
8148 }
8149
8150 ## ......................................................................
8151 ## feeds (RSS, Atom; OPML)
8152
8153 sub git_feed {
8154         my $format = shift || 'atom';
8155         my $have_blame = gitweb_check_feature('blame');
8156
8157         # Atom: http://www.atomenabled.org/developers/syndication/
8158         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8159         if ($format ne 'rss' && $format ne 'atom') {
8160                 die_error(400, "Unknown web feed format");
8161         }
8162
8163         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8164         my $head = $hash || 'HEAD';
8165         my @commitlist = parse_commits($head, 150, 0, $file_name);
8166
8167         my %latest_commit;
8168         my %latest_date;
8169         my $content_type = "application/$format+xml";
8170         if (defined $cgi->http('HTTP_ACCEPT') &&
8171                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8172                 # browser (feed reader) prefers text/xml
8173                 $content_type = 'text/xml';
8174         }
8175         if (defined($commitlist[0])) {
8176                 %latest_commit = %{$commitlist[0]};
8177                 my $latest_epoch = $latest_commit{'committer_epoch'};
8178                 exit_if_unmodified_since($latest_epoch);
8179                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8180         }
8181         print $cgi->header(
8182                 -type => $content_type,
8183                 -charset => 'utf-8',
8184                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8185                 -status => '200 OK');
8186
8187         # Optimization: skip generating the body if client asks only
8188         # for Last-Modified date.
8189         return if ($cgi->request_method() eq 'HEAD');
8190
8191         # header variables
8192         my $title = "$site_name - $project/$action";
8193         my $feed_type = 'log';
8194         if (defined $hash) {
8195                 $title .= " - '$hash'";
8196                 $feed_type = 'branch log';
8197                 if (defined $file_name) {
8198                         $title .= " :: $file_name";
8199                         $feed_type = 'history';
8200                 }
8201         } elsif (defined $file_name) {
8202                 $title .= " - $file_name";
8203                 $feed_type = 'history';
8204         }
8205         $title .= " $feed_type";
8206         $title = esc_html($title);
8207         my $descr = git_get_project_description($project);
8208         if (defined $descr) {
8209                 $descr = esc_html($descr);
8210         } else {
8211                 $descr = "$project " .
8212                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8213                          " feed";
8214         }
8215         my $owner = git_get_project_owner($project);
8216         $owner = esc_html($owner);
8217
8218         #header
8219         my $alt_url;
8220         if (defined $file_name) {
8221                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8222         } elsif (defined $hash) {
8223                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8224         } else {
8225                 $alt_url = href(-full=>1, action=>"summary");
8226         }
8227         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8228         if ($format eq 'rss') {
8229                 print <<XML;
8230 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8231 <channel>
8232 XML
8233                 print "<title>$title</title>\n" .
8234                       "<link>$alt_url</link>\n" .
8235                       "<description>$descr</description>\n" .
8236                       "<language>en</language>\n" .
8237                       # project owner is responsible for 'editorial' content
8238                       "<managingEditor>$owner</managingEditor>\n";
8239                 if (defined $logo || defined $favicon) {
8240                         # prefer the logo to the favicon, since RSS
8241                         # doesn't allow both
8242                         my $img = esc_url($logo || $favicon);
8243                         print "<image>\n" .
8244                               "<url>$img</url>\n" .
8245                               "<title>$title</title>\n" .
8246                               "<link>$alt_url</link>\n" .
8247                               "</image>\n";
8248                 }
8249                 if (%latest_date) {
8250                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8251                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8252                 }
8253                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8254         } elsif ($format eq 'atom') {
8255                 print <<XML;
8256 <feed xmlns="http://www.w3.org/2005/Atom">
8257 XML
8258                 print "<title>$title</title>\n" .
8259                       "<subtitle>$descr</subtitle>\n" .
8260                       '<link rel="alternate" type="text/html" href="' .
8261                       $alt_url . '" />' . "\n" .
8262                       '<link rel="self" type="' . $content_type . '" href="' .
8263                       $cgi->self_url() . '" />' . "\n" .
8264                       "<id>" . href(-full=>1) . "</id>\n" .
8265                       # use project owner for feed author
8266                       "<author><name>$owner</name></author>\n";
8267                 if (defined $favicon) {
8268                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8269                 }
8270                 if (defined $logo) {
8271                         # not twice as wide as tall: 72 x 27 pixels
8272                         print "<logo>" . esc_url($logo) . "</logo>\n";
8273                 }
8274                 if (! %latest_date) {
8275                         # dummy date to keep the feed valid until commits trickle in:
8276                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8277                 } else {
8278                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8279                 }
8280                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8281         }
8282
8283         # contents
8284         for (my $i = 0; $i <= $#commitlist; $i++) {
8285                 my %co = %{$commitlist[$i]};
8286                 my $commit = $co{'id'};
8287                 # we read 150, we always show 30 and the ones more recent than 48 hours
8288                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8289                         last;
8290                 }
8291                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8292
8293                 # get list of changed files
8294                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8295                         $co{'parent'} || "--root",
8296                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8297                         or next;
8298                 my @difftree = map { chomp; $_ } <$fd>;
8299                 close $fd
8300                         or next;
8301
8302                 # print element (entry, item)
8303                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8304                 if ($format eq 'rss') {
8305                         print "<item>\n" .
8306                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8307                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8308                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8309                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8310                               "<link>$co_url</link>\n" .
8311                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8312                               "<content:encoded>" .
8313                               "<![CDATA[\n";
8314                 } elsif ($format eq 'atom') {
8315                         print "<entry>\n" .
8316                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8317                               "<updated>$cd{'iso-8601'}</updated>\n" .
8318                               "<author>\n" .
8319                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8320                         if ($co{'author_email'}) {
8321                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8322                         }
8323                         print "</author>\n" .
8324                               # use committer for contributor
8325                               "<contributor>\n" .
8326                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8327                         if ($co{'committer_email'}) {
8328                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8329                         }
8330                         print "</contributor>\n" .
8331                               "<published>$cd{'iso-8601'}</published>\n" .
8332                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8333                               "<id>$co_url</id>\n" .
8334                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8335                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8336                 }
8337                 my $comment = $co{'comment'};
8338                 print "<pre>\n";
8339                 foreach my $line (@$comment) {
8340                         $line = esc_html($line);
8341                         print "$line\n";
8342                 }
8343                 print "</pre><ul>\n";
8344                 foreach my $difftree_line (@difftree) {
8345                         my %difftree = parse_difftree_raw_line($difftree_line);
8346                         next if !$difftree{'from_id'};
8347
8348                         my $file = $difftree{'file'} || $difftree{'to_file'};
8349
8350                         print "<li>" .
8351                               "[" .
8352                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8353                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8354                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8355                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8356                                       -title => "diff"}, 'D');
8357                         if ($have_blame) {
8358                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8359                                                              file_name=>$file, hash_base=>$commit),
8360                                               -class => "blamelink",
8361                                               -title => "blame"}, 'B');
8362                         }
8363                         # if this is not a feed of a file history
8364                         if (!defined $file_name || $file_name ne $file) {
8365                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8366                                                              file_name=>$file, hash=>$commit),
8367                                               -title => "history"}, 'H');
8368                         }
8369                         $file = esc_path($file);
8370                         print "] ".
8371                               "$file</li>\n";
8372                 }
8373                 if ($format eq 'rss') {
8374                         print "</ul>]]>\n" .
8375                               "</content:encoded>\n" .
8376                               "</item>\n";
8377                 } elsif ($format eq 'atom') {
8378                         print "</ul>\n</div>\n" .
8379                               "</content>\n" .
8380                               "</entry>\n";
8381                 }
8382         }
8383
8384         # end of feed
8385         if ($format eq 'rss') {
8386                 print "</channel>\n</rss>\n";
8387         } elsif ($format eq 'atom') {
8388                 print "</feed>\n";
8389         }
8390 }
8391
8392 sub git_rss {
8393         git_feed('rss');
8394 }
8395
8396 sub git_atom {
8397         git_feed('atom');
8398 }
8399
8400 sub git_opml {
8401         my @list = git_get_projects_list($project_filter, $strict_export);
8402         if (!@list) {
8403                 die_error(404, "No projects found");
8404         }
8405
8406         print $cgi->header(
8407                 -type => 'text/xml',
8408                 -charset => 'utf-8',
8409                 -content_disposition => 'inline; filename="opml.xml"');
8410
8411         my $title = esc_html($site_name);
8412         my $filter = " within subdirectory ";
8413         if (defined $project_filter) {
8414                 $filter .= esc_html($project_filter);
8415         } else {
8416                 $filter = "";
8417         }
8418         print <<XML;
8419 <?xml version="1.0" encoding="utf-8"?>
8420 <opml version="1.0">
8421 <head>
8422   <title>$title OPML Export$filter</title>
8423 </head>
8424 <body>
8425 <outline text="git RSS feeds">
8426 XML
8427
8428         foreach my $pr (@list) {
8429                 my %proj = %$pr;
8430                 my $head = git_get_head_hash($proj{'path'});
8431                 if (!defined $head) {
8432                         next;
8433                 }
8434                 $git_dir = "$projectroot/$proj{'path'}";
8435                 my %co = parse_commit($head);
8436                 if (!%co) {
8437                         next;
8438                 }
8439
8440                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8441                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8442                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8443                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8444         }
8445         print <<XML;
8446 </outline>
8447 </body>
8448 </opml>
8449 XML
8450 }